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Library Research Guide for the History of Science: Introduction

• What is a Primary Source?
• Senior Theses 2023
• Background and Context/Biography
• Exploring Your Topic
• Using HOLLIS
• What is a Secondary Source?

Page Contents

Knowing a primary source when you see one, kinds of primary sources, find primary sources in hollis, using digital libraries and collections online, using bibliographies.

• Exploring the Special Collections at Harvard
• Citing Sources & Organizing Research

Primary sources provide first-hand testimony or direct evidence concerning a topic under investigation. They are created by witnesses or recorders who experienced the events or conditions being documented.

Often these sources are created at the time when the events or conditions are occurring, but primary sources can also include autobiographies, memoirs, and oral histories recorded later.

Primary sources are characterized by their content, regardless of the format available. (Handwritten notes could be published; the published book might be digitized or put on microfilm, but those notes are still primary sources in any format).

Some types of primary sources:

• Original documents (excerpts or translations acceptable): Diaries, speeches, manuscripts, letters, interviews, news film footage, contemporary newspaper articles, autobiographies, official records, pamphlets, meeting notes, photographs, contemporary sketches
• Creative works : Poetry, drama, novels, music, art 
• Relics or artifacts : Furniture, clothing, buildings

Examples of primary sources include:

• A poster from the Brotherhood of Sleeping Car Porters' 1962 strike
• The papers of William James
• A 1970 U.S. State Dept document updating Nixon on U.S.-Soviet space cooperation activities (Harvard login)
• A British pamphlet: "Electric Lighting for Country Houses," 1898
• Phineas Gage's skull
• The text of J. Robert Oppenheimer's "Atomic Weapons" presentation to the American Philosophical Society

Outline of Primary Sources for History

Archives and Manuscripts

Archives and manuscripts are the unpublished records of persons (letters, notes, diaries, etc.) and organizations. What are Archives?   Usually each archival collection has a (short) catalog record and a detailed finding aid (which is often available online).

• "Catalog record” refers to the kind of record found in library online catalogs, similar to those for books, although often a bit longer. Example of an Archive record .
• “Finding aid” (sometimes called an inventory) generally refers to a list of the folder labels for the collection, accompanied by a brief collection overview (scope and contents note) and a biographical (or institutional) note on the creator of the collection.  Finding aids may be as long as needed given the size of the collection.  They vary considerably according to the practices of individual repositories. Example of a Finding aid .

To find  Archives and manuscripts  at Harvard, go to  HOLLIS Advanced search .  Search your keywords or Subject terms (see the  HOLLIS page of this guide ) in the Library Catalog, limiting to Resource Type: Archives/Manuscripts.  You can choose the library at the right (Search Scope).  Countway  Medicine has abundant medical archives, and Schlesinger has many archives of women activists, many in health and reproductive rights fields.    Sample search on Subject: Women health .

Library Research Guide for Finding Manuscripts and Archival Collections explains

• How to find archives and manuscripts at Harvard
• How to find archives and manuscripts elsewhere in US via search tools and via subject guides .
• How to find archives and manuscripts in Europe and elsewhere.
• Requesting digitization of archival material from Harvard and from other repositories .

For digitized archival material together with other kinds of primary sources:

• Finding Primary Sources Online offers general instructions for finding primary sources online and a list of resources by region and country
• Online Primary Source Collections for the History of Science lists digital collections at Harvard and beyond by topic.
• Online Primary Source Collections for History lists digital collections at Harvard and beyond by topic.

Methods for finding books are described under the HOLLIS page  of this guide and in the Finding Primary Sources in HOLLIS box on this page. 

• Book Reviews may give an indication as to how a scientific work was received. See:   Finding Book Reviews . 
• Numerous, especially pre-1923 books (as well as periodicals and other sources) can be found and full text searched in several digital libraries (see box on this page).

Periodicals

Scientific articles :

Web of Science Citation Indexes (Harvard Login)  (1900- ) articles in all areas of science. Includes medical articles not in PubMed. You can use the Cited Reference search in the Web of Science to find primary source articles that cite a specified article, thus getting an idea of its reception. More information on the Web of Science .

PubMed (1946- ) covers, usually with abstracts, periodical articles on all areas of medicine. - --Be sure to look at the MeSH (Medical Subject Headings)  at the bottom of pertinent records. Very recent articles may not as yet received their MeSH terms.  So look at older records to find the MeSH terms, and use a variety of keywords as well as MeSH terms to find the new records. --​The MeSH terms are the same as the Medical Subject terms found in HOLLIS. --Hit Free article or Try Harvard Library, not the publisher's name to see full text

JSTOR (Harvard Login)  offers full-text of complete runs (up to about 5 years ago) of over 400 journals. JSTOR allows simultaneous or individual searching, full-text searching optional, numerous journals in a variety of fields of science and medicine. See the list at the bottom of the Advanced search screen. JSTOR searches the "Notes and News" sections of journals ( Science is especially rich in this material). In Advanced Search choose Item Type: Miscellaneous to limit largely to "Notes and News".

PsycINFO) (Harvard Login)  (1872- ) indexes the professional and academic literature in psychology and related disciplines

Many more scientific periodical indexes are listed in the Library Research Guide for the History of Science .

General interest magazines and periodicals see:

American Periodicals Series Online (Harvard Login)  (1740-1900) offers full text of about 1100 American periodicals. Includes several scientific and medical journals including the American Journal of Science and the Medical Repository. In cases where a periodical started before 1900, coverage is included until 1940.

British Periodicals (Harvard Login)  (1681-1920) offers full text for several hundred British periodicals.

Ethnic NewsWatch (Harvard Login)  (1959- ) is a full text database of the newspapers, magazines, and journals of the ethnic, minority and native press.

Periodicals Index Online (Harvard Login)  indexes contents of thousands of US and European journals in the humanities and social sciences, from their first issues to 1995.

Reader's Guide Retrospective (WilsonWeb) (Harvard Login)  (1890-1982)  indexes many American popular periodicals.

Many more general periodical indexes are listed in Finding Articles in General and Popular Periodicals (North America and Western Europe) .

Articles in non-science fields (religion, public policy): see the list in the Library Research Guide for History .

Professional/Trade : Aimed at particular trades or professions.  See the Library Research Guide for History

Newspaper articles : see the Guide to Newspapers and Newspaper Indexes .

Personal accounts . These are first person narratives recalling or describing a person’s life and opinions. These include Diaries, memoirs, autobiographies, and when delivered orally and recorded: Oral histories and Interviews.

National Library of Medicine Oral Histories

Regulatory Oral History Hub  (Kenan Institute for Ethics, Duke University) offers links to digital collections containing interviews with regulators, lawyers, and judges. Mainly U.S.

Visual sources :

Records for many, but by no means all, individual Harvard University Library images are available in  HOLLIS Images , an online catalog of images. Records include subjects and a thumbnail image.  HOLLIS Images is included in HOLLIS  searches.

Science & Society Picture Library offers over 50,000 images from the Science Museum (London), the National Museum of Photography, Film & Television and the National Railway Museum.

Database of Scientific Illustrators  (DSI) includes over 12500 illustrators in natural history, medicine, technology and various sciences worldwide, c.1450-1950. Living illustrators excluded. 

NYPL Digital Gallery Pictures of Science: 700 Years of Scientific and Medical Illustration

Images from the History of Medicine (IHM) includes prints and photographs from the U.S. National Library of Medicine. (The IHM is contained within a larger NLM image database, so this link goes to a specialized search).

Images From the History of the Public Health Service: a Photographic Exhibit .

Wellcome Images

Films/Videos

To find films in  HOLLIS , search your topic keywords, then on the right side of the results screen, look at Resource Type and choose video/film.

To find books about films about your topic, search your topic keywords AND "in motion pictures" ​  (in "")

​Film Platform  offers numerous documentary films on a wide variety of subjects.  There are collections on several topics. Searches can be filtered by topic, country of production, and language. 

A list of general sources for images and film is available in the Library Research Guide for History and additional sources for the history of science in Library Research Guide for the History of Science .

Government documents often concern matters of science and health policy.  For Congressional documents, especially committee reports, see ProQuest Congressional (Harvard Login ). 

HathiTrust Digital Library . Each full text item is linked to a standard library catalog record, thus providing good metadata and subject terms. The catalog can be searched separately.  Many government documents are full text viewable.  Search US government department as Author.

More sources are listed in the Library Research Guide for History

For artifacts and other objects , the Historic Scientific Instruments Collection in the Science Center includes over 15,000 instruments, often with contemporary documentation, from 1450 through the 20th century worldwide.

Waywiser, online database of the Collection of Historical Scientific Instruments .

Warren Anatomical Museum of the Center for the History of Medicine in the Countway Library of Medicine has a rich collection of medical artifacts and specimens.

Peabody Museum of Archaeology and Ethnology

Fall 2020: these collections are closed during the pandemic. Check out their links above to see what they have available online.

Primary Source Terms :

You can limit HOLLIS  searches to your time period, but sources may be published later, such as a person's diary published posthumously. Find these with these special Subject terms.

You can use the following terms to search HOLLIS for primary sources:

• Correspondence
• Description and travel
• Manuscripts
• Notebooks, sketchbooks, etc.
• Personal narratives (refers to accounts of wars and diseases only)
• Pictorial works
• Sources (usually refers to collections of published primary sources)

Include these terms with your topical words in HOLLIS searches. For example: tuberculosis personal narratives

Online Primary Source Collections for the History of Science lists digital collections at Harvard and beyond by topic

Google Book Search, HathiTrust Digital Library and Internet Archives offer books and periodicals digitized from numerous libraries.  Only out-of-copyright, generally post-1923, books are fully viewable.  Each of these three digital libraries allows searching full text over their entire collections.

Google Book Search

HathiTrust Digital Library . Each full text item is linked to a standard library catalog record, thus providing good metadata and subject terms. The catalog can be searched separately.  Many post-1923 out-of-copyright books, especially government documents, are full text viewable. You can search within copyright books to see what page your search term is on.

Internet Archive now offers a beta full text search. Put your terms (phrases or personal names, in quotation marks (""), work best) in the search box. 

The Online Books Page arranges electronic texts by Library of Congress call numbers and is searchable (but not full text searchable).  Includes books not in Google Books, HathiTrust, or Internet Archive. Has many other useful features.

Medical Heritage Library . Information about the Medical Heritage Library. Now searchable full text.

UK Medical Heritage Library

Biodiversity Heritage Library

Contagion: Historical Views of Diseases and Epidemics (1493-1922) provides digitized historical, manuscript, and image resources selected from Harvard University libraries and archives.

Expeditions and Discoveries (1626-1953) features nine expeditions in anthropology and archaeology, astronomy, botany, and oceanography in which Harvard University played a significant role. Includes manuscripts and records, published materials, visual works, and maps from 14 Harvard repositories.

Defining Gender Online: Five Centuries of Advice Literature for Men and Women (1450-1910).

Twentieth Century Advice Literature: North American Guides on Race, Sex, Gender, and the Family.

Many more general History digital libraries and collections: Library Research Guide for History

More History of Science digital libraries: Library Research Guide for the History of Science .

There may already be a detailed list of sources (a bibliography) for your topic.

For instance:

A bibliography of eugenics , by Samuel J. Holmes ... Berkeley, Calif., University of California press, 1924, 514 p. ( University of California publications in zoology . vol. XXV)  Full text online .

Look for specialized subject bibliographies in HOLLIS Catalog . Example .   WorldCat can do similar searches in the Subject Keyword field for non-Harvard holdings.

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What Is a Primary Source?

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In research and academics, a primary source refers to information collected from sources that witnessed or experienced an event firsthand. These can be historical documents , literary texts, artistic works, experiments, journal entries, surveys, and interviews. A primary source, which is very different from a secondary source , is also called primary data.

The Library of Congress defines primary sources as "the raw materials of history—original documents and objects which were created at the time under study," in contrast to secondary sources , which are "accounts or interpretations of events created by someone without firsthand experience," ("Using Primary Sources").

Secondary sources are often meant to describe or analyze a primary source and do not give firsthand accounts; primary sources tend to provide more accurate depictions of history but are much harder to come by.

Characteristics of Primary Sources

There are a couple of factors that can qualify an artifact as a primary source. The chief characteristics of a primary source, according to Natalie Sproull, are: "(1) [B]eing present during the experience, event or time and (2) consequently being close in time with the data. This does not mean that data from primary sources are always the best data."

Sproull then goes on to remind readers that primary sources are not always more reliable than secondary sources. "Data from human sources are subject to many types of distortion because of such factors as selective recall, selective perceptions, and purposeful or nonpurposeful omission or addition of information. Thus data from primary sources are not necessarily accurate data even though they come from firsthand sources," (Sproull 1988).

Original Sources

Primary sources are often called original sources, but this is not the most accurate description because you're not always going to be dealing with original copies of primary artifacts. For this reason, "primary sources" and "original sources" should be considered separate. Here's what the authors of "Undertaking Historical Research in Literacy," from Handbook of Reading Research , have to say about this:

"The distinction also needs to be made between primary and original sources . It is by no means always necessary, and all too often it is not possible, to deal only with original sources. Printed copies of original sources, provided they have been undertaken with scrupulous care (such as the published letters of the Founding Fathers), are usually an acceptable substitute for their handwritten originals." (E. J. Monaghan and D. K. Hartman, "Undertaking Historical Research in Literacy," in Handbook of Reading Research , ed. by P. D. Pearson et al. Erlbaum, 2000)

When to Use Primary Sources

Primary sources tend to be most useful toward the beginning of your research into a topic and at the end of a claim as evidence, as Wayne Booth et al. explain in the following passage. "[Primary sources] provide the 'raw data' that you use first to test the working hypothesis and then as evidence to support your claim . In history, for example, primary sources include documents from the period or person you are studying, objects, maps, even clothing; in literature or philosophy, your main primary source is usually the text you are studying, and your data are the words on the page. In such fields, you can rarely write a research paper  without using primary sources," (Booth et al. 2008).

When to Use Secondary Sources

There is certainly a time and place for secondary sources and many situations in which these point to relevant primary sources. Secondary sources are an excellent place to start. Alison Hoagland and Gray Fitzsimmons write: "By identifying basic facts, such as year of construction, secondary sources can point the researcher to the best primary sources , such as the right tax books. In addition, a careful reading of the bibliography in a secondary source can reveal important sources the researcher might otherwise have missed," (Hoagland and Fitzsimmons 2004).

Finding and Accessing Primary Sources

As you might expect, primary sources can prove difficult to find. To find the best ones, take advantage of resources such as libraries and historical societies. "This one is entirely dependent on the assignment given and your local resources; but when included, always emphasize quality. ... Keep in mind that there are many institutions such as the Library of Congress that make primary source material freely available on the Web," (Kitchens 2012).

Methods of Collecting Primary Data

Sometimes in your research, you'll run into the problem of not being able to track down primary sources at all. When this happens, you'll want to know how to collect your own primary data; Dan O'Hair et all tell you how: "If the information you need is unavailable or hasn't yet been gathered, you'll have to gather it yourself. Four basic methods of collecting primary data are field research, content analysis, survey research, and experiments. Other methods of gathering primary data include historical research, analysis of existing statistics, ... and various forms of direct observation," (O'Hair et al. 2001).

• Booth, Wayne C., et al. The Craft of Research . 3rd ed., University of Chicago Press, 2008.
• Hoagland, Alison, and Gray Fitzsimmons. "History."  Recording Historic Structures. 2nd. ed., John Wiley & Sons, 2004.
• Kitchens, Joel D. Librarians, Historians, and New Opportunities for Discourse: A Guide for Clio's Helpers . ABC-CLIO, 2012.
• Monaghan, E. Jennifer, and Douglas K. Hartman. "Undertaking Historical Research in Literacy." Handbook of Reading Research. Lawrence Erlbaum Associates, 2002.
• O'Hair, Dan, et al. Business Communication: A Framework for Success . South-Western College Pub., 2001.
• Sproull, Natalie L. Handbook of Research Methods: A Guide for Practitioners and Students in the Social Sciences. 2nd ed. Scarecrow Press, 1988.
• "Using Primary Sources." Library of Congress .
• Secondary Sources in Research
• Primary and Secondary Sources in History
• How to Prove Your Family Tree Connections
• Research in Essays and Reports
• Pros and Cons of Secondary Data Analysis
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• Primary vs. Secondary Sources | Difference & Examples

Primary vs. Secondary Sources | Difference & Examples

Published on June 20, 2018 by Raimo Streefkerk . Revised on May 31, 2023.

When you do research, you have to gather information and evidence from a variety of sources.

Primary sources provide raw information and first-hand evidence. Examples include interview transcripts, statistical data, and works of art. Primary research gives you direct access to the subject of your research.

Secondary sources provide second-hand information and commentary from other researchers. Examples include journal articles, reviews, and academic books . Thus, secondary research describes, interprets, or synthesizes primary sources.

Primary sources are more credible as evidence, but good research uses both primary and secondary sources.

Table of contents

What is a primary source, what is a secondary source, primary and secondary source examples, how to tell if a source is primary or secondary, primary vs secondary sources: which is better, other interesting articles, frequently asked questions about primary and secondary sources.

A primary source is anything that gives you direct evidence about the people, events, or phenomena that you are researching. Primary sources will usually be the main objects of your analysis.

If you are researching the past, you cannot directly access it yourself, so you need primary sources that were produced at the time by participants or witnesses (e.g. letters, photographs, newspapers ).

If you are researching something current, your primary sources can either be qualitative or quantitative data that you collect yourself (e.g. through interviews , surveys , experiments ) or sources produced by people directly involved in the topic (e.g. official documents or media texts).

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A secondary source is anything that describes, interprets, evaluates, or analyzes information from primary sources. Common examples include:

• Books , articles and documentaries that synthesize information on a topic
• Synopses and descriptions of artistic works
• Encyclopedias and textbooks that summarize information and ideas
• Reviews and essays that evaluate or interpret something

When you cite a secondary source, it’s usually not to analyze it directly. Instead, you’ll probably test its arguments against new evidence or use its ideas to help formulate your own.

Examples of sources that can be primary or secondary

A secondary source can become a primary source depending on your research question . If the person, context, or technique that produced the source is the main focus of your research, it becomes a primary source.

Documentaries

If you are researching the causes of World War II, a recent documentary about the war is a secondary source . But if you are researching the filmmaking techniques used in historical documentaries, the documentary is a primary source .

Reviews and essays

If your paper is about the novels of Toni Morrison, a magazine review of one of her novels is a secondary source . But if your paper is about the critical reception of Toni Morrison’s work, the review is a primary source .

Newspaper articles

If your aim is to analyze the government’s economic policy, a newspaper article about a new policy is a secondary source . But if your aim is to analyze media coverage of economic issues, the newspaper article is a primary source .

To determine if something can be used as a primary or secondary source in your research, there are some simple questions you can ask yourself:

• Does this source come from someone directly involved in the events I’m studying (primary) or from another researcher (secondary)?
• Am I interested in evaluating the source itself (primary) or only using it for background information (secondary)?
• Does the source provide original information (primary) or does it comment upon information from other sources (secondary)?

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Most research uses both primary and secondary sources. They complement each other to help you build a convincing argument. Primary sources are more credible as evidence, but secondary sources show how your work relates to existing research. Tertiary sources are often used in the first, exploratory stage of research.

What do you use primary sources for?

Primary sources are the foundation of original research. They allow you to:

• Make new discoveries
• Provide credible evidence for your arguments
• Give authoritative information about your topic

If you don’t use any primary sources, your research may be considered unoriginal or unreliable.

What do you use secondary sources for?

Secondary sources are good for gaining a full overview of your topic and understanding how other researchers have approached it. They often synthesize a large number of primary sources that would be difficult and time-consuming to gather by yourself. They allow you to:

• Gain background information on the topic
• Support or contrast your arguments with other researchers’ ideas
• Gather information from primary sources that you can’t access directly (e.g. private letters or physical documents located elsewhere)

When you conduct a literature review or meta analysis, you can consult secondary sources to gain a thorough overview of your topic. If you want to mention a paper or study that you find cited in a secondary source, seek out the original source and cite it directly.

Remember that all primary and secondary sources must be cited to avoid plagiarism . You can use Scribbr’s free citation generator to do so!

If you want to know more about ChatGPT, AI tools , citation , and plagiarism , make sure to check out some of our other articles with explanations and examples.

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Common examples of primary sources include interview transcripts , photographs, novels, paintings, films, historical documents, and official statistics.

Anything you directly analyze or use as first-hand evidence can be a primary source, including qualitative or quantitative data that you collected yourself.

Common examples of secondary sources include academic books, journal articles , reviews, essays , and textbooks.

Anything that summarizes, evaluates or interprets primary sources can be a secondary source. If a source gives you an overview of background information or presents another researcher’s ideas on your topic, it is probably a secondary source.

To determine if a source is primary or secondary, ask yourself:

• Was the source created by someone directly involved in the events you’re studying (primary), or by another researcher (secondary)?
• Does the source provide original information (primary), or does it summarize information from other sources (secondary)?
• Are you directly analyzing the source itself (primary), or only using it for background information (secondary)?

Some types of source are nearly always primary: works of art and literature, raw statistical data, official documents and records, and personal communications (e.g. letters, interviews ). If you use one of these in your research, it is probably a primary source.

Primary sources are often considered the most credible in terms of providing evidence for your argument, as they give you direct evidence of what you are researching. However, it’s up to you to ensure the information they provide is reliable and accurate.

Always make sure to properly cite your sources to avoid plagiarism .

A fictional movie is usually a primary source. A documentary can be either primary or secondary depending on the context.

If you are directly analyzing some aspect of the movie itself – for example, the cinematography, narrative techniques, or social context – the movie is a primary source.

If you use the movie for background information or analysis about your topic – for example, to learn about a historical event or a scientific discovery – the movie is a secondary source.

Whether it’s primary or secondary, always properly cite the movie in the citation style you are using. Learn how to create an MLA movie citation or an APA movie citation .

Articles in newspapers and magazines can be primary or secondary depending on the focus of your research.

In historical studies, old articles are used as primary sources that give direct evidence about the time period. In social and communication studies, articles are used as primary sources to analyze language and social relations (for example, by conducting content analysis or discourse analysis ).

If you are not analyzing the article itself, but only using it for background information or facts about your topic, then the article is a secondary source.

Cite this Scribbr article

If you want to cite this source, you can copy and paste the citation or click the “Cite this Scribbr article” button to automatically add the citation to our free Citation Generator.

Streefkerk, R. (2023, May 31). Primary vs. Secondary Sources | Difference & Examples. Scribbr. Retrieved July 27, 2024, from https://www.scribbr.com/working-with-sources/primary-and-secondary-sources/

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Primary Sources: What They Are and Where to Find Them

What is a primary source.

• Finding Primary Sources in the UWRF Library

A primary source is an original object or document created during the time under study.   Primary sources vary by discipline and can include historical and legal documents, diaries, letters, family records, speeches, interviews, autobiographies, film, government documents, eye witness accounts, results of an experiment, statistical data, pieces of creative writing, and art objects. In the natural and social sciences, the results of an experiment or study are typically found in scholarly articles or papers delivered at conferences, so those articles and papers that present the original results are considered primary sources.  

A secondary source is something written about a primary source. Secondary sources include comments on, interpretations of, or discussions about the original material. You can think of secondary sources as second-hand information. If I tell you something, I am the primary source. If you tell someone else what I told you, you are the secondard source. Secondary source materials can be articles in newspapers or popular magazines, book or movie reviews, or articles found in scholarly journals that evaluate or criticize someone else's original research.

Research versus Review

Scientific and other peer reviewed journals are excellent sources for primary research sources. However, not every article in those journals will be an article with original research. Some will include book reviews and other materials that are more obviously secondary sources . More difficult to differentiate from original research articles are review articles . Both types of articles will end with a list of References (or Works Cited). Review articles are often as lengthy or even longer that original research articles. What the authors of review articles are doing is analysing and evaluating current research or investigations related to a specific topic, field, or problem. They are not primary sources since they review previously published material. They can be helpful for identifying potentially good primary sources, but they aren't primary themselves. Primary research articles can be identified by a commonly used format. If an article contains the following elements, you can count on it being a primary research article. Look for sections entitled Methods (sometimes with variations, such as Materials and Methods), Results (usually followed with charts and statistical tables), and Discussion . You can also read the abstract to get a good sense of the kind of article that is being presented. If it is a review article instead of a research article, the abstract should make that clear. If there is no abstract at all, that in itself may be a sign that it is not a primary resource. Short research articles, such as those found in Science and similar scientific publications that mix news, editorials, and forums with research reports, may not include any of those elements. In those cases look at the words the authors use, phrases such as "we tested," "we used," and "in our study, we measured" will tell you that the article is reporting on original research.

Primary or Secondary: You Decide

The distinction between types of sources can get tricky, because a secondary source may also be a primary source. DoVeanna Fulton's book on slave narratives, for example, can be looked at as both a secondary and a primary source. The distinction may depend on how you are using the source and the nature of your research. If you are researching slave narratives, the book would be a secondary source because Fulton is commenting on the narratives. If your assignment is to write a book review of Speaking Power , the book becomes a primary source, because you are commenting, evaluating, and discussing DoVeanna Fulton's ideas.

You can't always determine if something is primary or secondary just because of the source it is found in. Articles in newspapers and magazines are usually considered secondary sources. However, if a story in a newspaper about the Iraq war is an eyewitness account, that would be a primary source. If the reporter, however, includes additional materials he or she has gathered through interviews or other investigations, the article would be a secondary source. An interview in the Rolling Stone with Chris Robinson of the Black Crowes would be a primary source, but a review of the latest Black Crowes album would be a secondary source. In contrast, scholarly journals include research articles with primary materials, but they also have review articles that are not, or in some disciplines include articles where scholars are looking at primary source materials and coming to new conclusions.

For your thinking and not just to confuse you even further, some experts include tertiary sources as an additional distinction to make. These are sources that compile or, especially, digest other sources. Some reference materials and textbooks are considered tertiary sources when their chief purpose is to list or briefly summarize or, from an even further removed distance, repackage ideas. This is the reason that you may be advised not to include an encyclopedia article in a final bibliography.

The above material was adapted from the excellent explanation written by John Henderson found on Ithaca College's library website http://www.ithacalibrary.com/sp/subjects/primary and is used with permission.

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• How to plan your visit to an archive
• Using digitized primary sources
• Evaluating primary sources

A primary source is an eyewitness account of an event or data obtained through original statistical or scientific research. 

What are some examples of primary sources?

• Photographs
• Official records (government reports, transcripts, court records, death certificates, etc.)
• Contemporary news reports (newspapers, telecasts, radio addresses, etc.)
• Polls and Public Opinion Data
• Laws, statutes, hearings

Secondary Source

A secondary source interprets and analyzes primary sources. These sources are one or more steps removed from the event. Secondary sources may include pictures of primary sources or quotes from them. Some types of secondary sources include: journal/magazine articles, textbooks, commentaries, and encyclopedias.

Newspapers may be either primary or secondary. Most articles in newspapers are secondary, but reporters may be considered as witnesses to an event.  Any topic on the media coverage of an event or phenomenon would treat newspapers as a primary source. 

Source: https://guides.libraries.indiana.edu/primarysources

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• Last Updated: Apr 8, 2024 3:55 PM
• URL: https://guides.lib.berkeley.edu/primarysourceresearch101

• Primary Sources
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• Using Archives This link opens in a new window

Primary Sources Definition

What are primary sources .

Primary sources enable the researcher to get as close as possible to the truth of what actually happened during an historical event or time period. Primary source is a term used in a number of disciplines to describe source material that is closest to the person, information, period, or idea being studied.  A primary source (also called original source ) is a document, recording, artifact, or other source of information that was created at the time under study, usually by a source with direct personal knowledge of the events being described. It serves as an original source of information about the topic.

Similar definitions are used in library science , and other areas of scholarship. In journalism, a primary source can be a person with direct knowledge of a situation, or a document created by such a person. Primary sources are distinguished from secondary sources , which cite, comment on, or build upon primary sources, though the distinction is not a sharp one.

Newspaper Research

• Historical Newspapers (ProQuest) This link opens in a new window Includes the New York Times, Chicago Tribune, LA Times, Christian Science Monitor, and more. Newspapers are in PDF format and provide a visual representation of the newspaper.
• ProQuest Central This link opens in a new window Includes both newspapers and scholarly journals
• Historical Newspapers The Guardian and The Observer Search The Guardian (1821-2003) and its sister paper, The Observer (1791-2003)
• New York Newspaper Archive This link opens in a new window Access New York Newspaper Archives and discover stories of the past with NewspaperArchive.com. The archive covers New York history from 1753-2023, with lots of content from smaller, local newspapers. Articles have been scanned as PDFs and include images and advertisements, and are full text searchable.
• America's Historical Newspapers This link opens in a new window America's Historical Newspapers includes articles from local and regional American and Hispanic American newspapers from all 50 states. Coverage dates from 1690 to the early 20th century. Articles have been scanned as PDFs and include images and advertisements, and are full text searchable. More information less... We are currently working on resolving access issues to this platform.
• American Periodicals Series Online This link opens in a new window includes digitized images of the pages of American magazines and journals published from colonial days to the dawn of the 20th century, 1740-1940.
• Times Digital Archive (London) This link opens in a new window Provides full-text access to back issues of The Times newspaper. Dates of coverage: 1785 to 2006.
• Hispanic American Newspapers, 1808-1980 This link opens in a new window Hispanic American Newspapers, 1808-1980 provides access to searchable digitized copies of newspapers printed in the U.S. during the 19th and 20th centuries for a Hispanic readership. It features hundreds of monolingual and bilingual newspapers in Spanish and English, including many obscure titles from the 19th century. More information less... We are currently working on resolving access issues to this platform.
• Global Newsstream This link opens in a new window Full text of 300+ U.S. and international news sources. Includes coverage of 150+ major U.S. and international newspapers such as The New York Times and the Times of London, plus hundreds of other news sources and news wires.
• Gale Newspaper Sources This link opens in a new window The Gale NewsVault is a portal to several historical collections of British newspapers and periodicals. It enables full-text searching across several titles simultaneously, including the Times of London, Financial Times, and Times Literary Supplement, along with aggregate newspaper and periodical collections covering the 17th, 18th, and 19th centuries.
• Access World News This link opens in a new window Access World News provides the html full text and, for some titles, the pdf "as printed" visual representation, of articles from a variety of national and international news sources, including newspapers, digital-native news websites, television and radio transcripts, blogs, college and university newspapers, journals, magazines, and some audio and video. Most international titles are English language. Dates of coverage vary from title to title, but primarily span the late 20th century to present.

The Billy Rose Theatre Collection

TITLE: [Scene from Othello with Paul Robeson as Othello and Uta Hagen as Desdemona, Theatre Guild Production, Broadway, 1943-44]   http://commons.wikimedia.org/wiki/File:Robeson_Hagen_Othello.jpg SOURCE:Prints and Photographs Division Washington, D.C. 20540

The Billy Rose Theatre Collection of The New York Public Library is one of the largest and most comprehensive archives devoted to the theatrical arts. This image is a work of an employee of the United States Farm Security Administration or Office of War Information domestic photographic units, created during the course of the person's official duties. As a work of the U.S. federal government, the image is in the public domain.

• Billy Rose Collection NYPL The Billy Rose Theatre Division of The New York Public Library is one of the largest and most comprehensive archives devoted to the theatrical arts.
• New York Public Library Archives & Manuscripts On this site, you can search The New York Public Library's vast holdings, initiate a research visit, submit a query to an archivist, and access digitized material. Most Broadway shows can be viewed in the special collections. You will need a NYPL library card to view them.
• ArchiveGrid This link opens in a new window Thousands of libraries, museums, and archives have contributed nearly a million collection descriptions to ArchiveGrid.
• WorldCat - FirstSearch (OCLC) This link opens in a new window Search for books and more in libraries in the U.S. and around the world. Indicates when NYU Libraries holds a copy of a book and shows you nearby libraries with holdings.
• Internet Archive Internet Archive is a non-profit digital library offering free universal access to books, movies & music, as well as 456 billion archived web pages.
• Archives Unbound This link opens in a new window NYU is currently subscribing 14 collections:African America, Communists, and the National Negro Congress; Federal Response to Radicalism; Federal Surveillance of African Americans; Feminism in Cuba - 19th through 20th century archival document; Global Missions and Theology; India from Crown Rule to Republic; Testaments to the Holocaust (Documents and Rare Printed Materials from the Wiener Library, London); The Hindu Conspiracy Cases (Activities of the Indian Independence Movement in the U.S., 1908-1933); The Indian Army and Colonial Warfare on the Frontiers of India; The International Women’s Movement (The Pan Pacific Southeast Asia Women’s Association of the USA, 1950-1985); The Middle East Online - Arab-Israeli Relations; The Middle East Online - Iraq; U.S. and Iraqi Relations: U.S. Technical Aid; and, Witchcraft in Europe.

Historical Databases

An advert for P.T. Barnum's "Feejee Mermaid" in 1842 or thereabout. Author: P. T. Barnum or an employee, Source: Newspaper advert commons.wikimedia.org/ wiki/File:Barnum_mermai... This image (or other media file) is in the public domain because its copyright has expired.

• America: History and Life with Full Text This link opens in a new window ndexes literature covering the history and culture of the United States and Canada, from prehistory to the present. The database indexes 1,700 journals and also includes citations and links to book and media reviews. Strong English-language journal coverage is balanced by an international perspective on topics and events, including abstracts in English of articles published in more than 40 languages. Publication dates of coverage: 1964 to present.
• Historical Abstracts with Full Text (EBSCO) This link opens in a new window Covers the history of the world (excluding the United States and Canada) from 1450 to the present, including world history, military history, women's history, history of education, and more. Indexes more than 1,700 academic historical journals in over 40 languages. Publication dates of coverage: 1955 to present.
• Theatre in Context Collection This link opens in a new window O’Dell’s Annals of the New York Stage, the Oxford University Press Companion series, and Greenwood’s American Theatre Companies series are just a few of the many in-copyright sources included in the Theatre in Context Collection. Placed alongside thousands of playbills, posters, photographs, and related theatrical ephemera, users will be able to paint a more comprehensive picture of the life and evolution of dramatic works.
• Black Thought and Culture This link opens in a new window Contains 1297 sources with 1100 authors, covering the non-fiction published works of leading African-Americans. Particular care has been taken to index this material so that it can be searched more thoroughly than ever before. Where possible the complete published non-fiction works are included, as well as interviews, journal articles, speeches, essays, pamphlets, letters and other fugitive material.
• Periodicals Archive Online This link opens in a new window Provides full-text and full-image access to hundreds of journals published in the arts, humanities, social sciences, and areas of general popular interest. Each periodical is covered back to its first issue, regardless of when it began publication. International in scope, PAO covers periodicals in a number of Western languages.
• Accessible Archives This link opens in a new window Includes the following collections: African American Newspapers, The Civil War Part I. A Newspaper Perspective, The Pennsylvania Genealogical Catalog, Pennsylvania Newspaper Record, South Carolina Newspapers, and The Liberator. ** Within these collections are papers such as The Charleston Mercury, The Christian Recorder, The Colored American, Douglass Monthly, Frederick, Douglass Paper, Freedom's Journal, Godey's Lady's Book, The Liberator, The National Era, The New York Herald, The North Star, The Pennsylvania Gazette, The Pennsylvania Packet, The Maryland Gazette, Provincial Freeman, Richmond Enquirer, The South Carolina Gazette, The Gazette of the State of South Carolina, The South Carolina Gazette and Country Journal, The South Carolina and American General Gazette, Weekly Advocate.
• Early English Books Online (EEBO) This link opens in a new window Early English Books Online (EEBO) contains digital facsimile page images of virtually every work printed in England, Ireland, Scotland, Wales and British North America and works in English printed elsewhere from 1473-1700. Searchable full text is also available for a subset of the collection.
• Eighteenth Century Journals This link opens in a new window Eighteenth Century Journals brings together rare journals printed between 1685 and 1835, primarily in the British Isles (with some publications from India, the Caribbean, and Europe). Users can view and download page images and search transcribed full text for all journals in the collection.
• C19: The 19th Century Index This link opens in a new window C19: The 19th Century Index provides bibliographic coverage of nineteenth-century books, periodicals, official documents, newspapers and archives from the English-speaking world. This database includes the Wellesley Index to Victorian Periodicals (1824-1900), Poole's Index to Periodical Literature, Palmer's Index to The Times, the Nineteenth Century Short Title Catalogue, and more.
• Sixties: Primary Documents and Personal Narratives 1960 - 1974 This link opens in a new window This resource consists of diaries, letters, autobiographies and other memoirs, written and oral histories, manifestos, government documents, memorabilia, and scholarly commentary. With 150,000 pages of material at completion, this searchable collection is a resource for students and scholars researching this period in American history, culture, and politics.
• African American Archives (via Fold3) This link opens in a new window This full text resource offers access to original documents that reveal a side of the African American story that few have seen before.
• African American Experience This link opens in a new window Full-text digital resource exploring the history and culture of African Americans, as well as the greater Black Diaspora. Features access to full-text content from more than 400 titles, 3,000 slave narratives, over 2000 images, 5,000 primary sources, and 250 vetted Web sites.

Letters & Diaries /Oral Histories

• Oral History Online This link opens in a new window Provides in-depth indexing to more than 2,700 collections of Oral History in English from around the world. The collection provides keyword searching of almost 281,000 pages of full-text by close to 10,000 individuals from all walks of life.
• American Civil War: Letters and Diaries This link opens in a new window This database contains 2,009 authors and approximately 100,000 pages of diaries, letters and memoirs. Includes 4,000 pages of previously unpublished manuscripts such as the letters of Amos Wood and his wife and the diary of Maryland Planter William Claytor. The collection also includes biographies, an extensive bibliography of the sources in the database, and material licensed from The Civil War Day-by-Day by E.B. Long.
• British and Irish Women's Letters and Diaries This link opens in a new window Includes 10,000 pages of diaries and letters revealing the experiences of approximately 500 women. The collection now includes primary materials spanning more than 300 years. The collection also includes biographies and an extensive annotated bibliography of the sources in the database.
• North American Immigrant Letters, Diaries and Oral Histories This link opens in a new window North American Immigrant Letters, Diaries and Oral Histories includes 2,162 authors and approximately 100,000 pages of information, so providing a unique and personal view of what it meant to immigrate to America and Canada between 1800 and 1950. Contains contemporaneous letters, diaries, oral histories, interviews, and other personal narratives.
• North American Women's Letters and Diaries This link opens in a new window North American Women's Letters and Diaries includes the immediate experiences of 1,325 women and 150,000 pages of diaries and letters.

Gale Primary Sources

• Gale Primary Sources This link opens in a new window Gale Artemis is a groundbreaking research environment that integrates formerly disparate digital collections to enable innovative research. Gale Artemis provides an unprecedented, seamless research experience that helps students find a starting point, search across a wide array of materials and points in time, and discover new ways to analyze information.

Victorian Popular Culture

• Victorian Popular Culture This link opens in a new window An essential resource for the study of popular entertainment in the nineteenth and early twentieth centuries. This innovative portal invites users into the darkened halls, small backrooms and travelling venues that hosted everything from spectacular shows and bawdy burlesque, to the world of magic and spiritualist séances. ** The resource is divided into four self-contained sections: Moving Pictures, Optical Entertainments and the Advent of Cinema; Music Hall, Theatre and Popular Entertainment; Circuses, Sideshows and Freaks; Spiritualism, Sensation and Magic

Historical Image Collections

commons.wikimedia.org/ wiki/File:Cushman_in_Ha... , The American actress Charlotte Cushman advertised in William Shakespeare's Hamlet at the Washington Theater in 1861.  Author:Washington Theater, SOURCE:Public Library of Congress. this image (or other media file) is in the public domain because its copyright has expired.

• American Broadsides and Ephemera This link opens in a new window American Broadsides and Ephemera offers fully searchable images of approximately 15,000 broadsides printed between 1820 and 1900 and 15,000 pieces of ephemera printed between 1760 and 1900. The remarkably diverse subjects of these broadsides range from contemporary accounts of the Civil War, unusual occurrences and natural disasters to official government proclamations, tax bills and town meeting reports. Featuring many rare items, the pieces of ephemera include clipper ship sailing cards, early trade cards, bill heads, theater and music programs, stock certificates, menus and invitations documenting civic, political and private celebrations. More information less... We are currently working on resolving access issues to this platform.
• Early American Imprints, Series I. Evans, 1639-1800 This link opens in a new window Search or browse the books, pamphlets, broadsides and other imprints listed in the renowned bibliography by Charles Evans. More information less... We are currently working on resolving access issues to this platform.
• Early American Imprints, Series II. Shaw-Shoemaker, 1801-1819 This link opens in a new window Search or browse the books, pamphlets, broadsides and other imprints listed in the distinguished bibliography by Ralph R. Shaw and Richard H. Shoemaker. 1801-1819 More information less... We are currently working on resolving access issues to this platform.
• American Antiquarian Society (AAS) Historical Periodicals Collection (EBSCO) This link opens in a new window Provide digital access to the most comprehensive collection of American periodicals published between 1691 and 1877. Included digitized images of American magazines and journals never before available outside the walls of the American Antiquarian Society. The collection is available in five series: Series 1 (1691-1820) - Series 2 (1821-1837) - Series 3 (1838-1852) - Series 4 (1853-1865) - Series 5 (1866-1877)

Link to Bobst Special Collections

• NYU Special Collections Bobst Library's Special Collections department houses significant archival resources including materials from the Downtown Collection, which documents New York City's downtown arts scene from the 1970s through the early 1990s. Maria Irene Fornés and Richard Foreman are among the many artists whose materials are housed in the Downtown Collection.
• Fales It is especially strong in English literature from the middle of the 18th century to the present, documenting developments in the novel. The Downtown Collection documents the downtown New York art, performance, and literary scenes from 1975 to the present and is extremely rich in archival holdings, including extensive film and video objects.
• Tamiment One of the finest research collections in the country documenting the history of radical politics: socialism, communism, anarchism, utopian experiments, the cultural left, the New Left, and the struggle for civil rights and civil liberties.

Guide to International Collections

• SIBMAS International Directory of Performing Arts Collections and Institutions

Books Containing Primary Source Documents

• The mediaeval stage by Chambers, E. K. (Edmund Kerchever), 1866-1954 Call Number: Online versions avail.
• The Elizabethan stage by Chambers, E. K. (Edmund Kerchever), 1866-1954 Call Number: PN2589 .C4 1965 4 vol. plus online version avail
• The diary of Samuel Pepys by Pepys, Samuel, 1633-1703 Call Number: Avail. online
• A history of theatrical art in ancient and modern times. by Mantzius, Karl, 1860-1921 Call Number: PN2106 .M313 1970 4 vol. also internet access
• Ben Jonson by Ben Jonson Call Number: online access
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• Last Updated: Jul 17, 2024 12:39 PM
• URL: https://guides.nyu.edu/primary

Primary Sources Research Guide

• What Are Primary Sources?
• What Are Secondary Sources?
• Examples of Primary & Secondary Sources
• Where to Look for Primary Sources

Get Primary Sources by Subject

Many library subject guides contain sections on primary sources for those subjects. BELOW you can also see a list of research guides that have been tagged "primary sources."

Still have questions? Please get in touch with the librarian for your subject area for more information about specific primary sources in your field.

Defining Primary Sources

• Primary sources are original materials that provide direct evidence or first-hand testimony concerning a topic or event -- firsthand records created by people who actually participated in or remembered an event and reported on the event and their reactions to it.
• Primary sources can be contemporary sources created at the time when the event occurred (e.g., letters and newspaper articles) or later (such as, memoirs and oral history interviews).
• Primary sources may be published or unpublished. Unpublished sources include unique materials (e.g., family papers) often referred to as archives and manuscripts.
• What constitutes a primary source varies by discipline -- see Primary Sources by Discipline below . How the researcher uses the source generally determines whether it is a primary source or not.

*This material is used with permission from the University of Pittsburgh Library's research guide on Primary Sources

Primary Sources by Discipline

The definition of a primary source varies depending upon the academic discipline and the context in which it is used.

1. In the humanities , a primary source could be defined as something that was created either during the time period being studied or afterward by individuals reflecting on their involvement in the events of that time.

Examples from the humanities:  

Art: painting, photograph, print, sculpture, film or other work of art, sketch book, architectural model or drawing, building or structure, letter,  organizational records, personal account by artist History: artifact, diary, government report, interview, letter, map, news report, oral history, organizational records, photograph, speech, work of art Literature: interview, letter, manuscript, personal account by writer, poem, work of fiction or drama, contemporary review Music: score, sound recording, contemporary review, letter, personal account by composer or musician

2. In the social sciences , the definition of a primary source would be expanded to include numerical data that has been gathered to analyze relationships between people, events, and their environment.  

Examples from the social sciences: 

Anthropology: artifact, field notes, fossil, photograph Business: market research or surveys, anything that documents a corporation's activities, such as annual reports, meeting minutes, legal documents, marketing materials, and financial records. Communication: websites, blogs, broadcast recordings and transcripts, advertisements and commercials, public opinion polls, and magazines (e.g., Rolling Stone ). Economics: company statistics, consumer survey, data series Geography: field notes, census data, maps, satellite images, and aerial photographs. Law: code, statute, court opinion, legislative report Psychology: case study, clinical case report, experimental replication, follow-up study, longitudinal study, treatment outcome study Sociology: cultural artifact, interview, oral history, organizational records, statistical data, survey

3. In the natural sciences , a primary source could be defined as a report of original findings or ideas. These sources often appear in the form of research articles with sections on methods and results.

Examples in the natural sciences:

Biology, Chemistry, etc: research or lab notes, genetic evidence, plant specimens, technical reports, and other reports of original research or discoveries (e.g., conference papers and proceedings, dissertations, scholarly articles).

*This material is used with permission from the Lafayette College Library research guide on primary sources . Image 1: "Massachusetts Bay Colony 1776"  CC BY-NC-ND 2.0 Tom Woodward: Flickr Image 2: "data"  CC BY-NC-ND 2.0 CyberHades: Flickr Image 3: "Katydid 50x Magnification Wing, Coventry, CT"  CC BY-NC-ND 2.0 Macroscopic Solutions: Flickr

Examples of Primary Sources

Primary sources typically include such items as:

• manuscripts, letters, first-person diaries, memoirs, personal journals, interviews, speeches, oral histories, and other materials individuals used to describe events in which they were participants or observers. Many of these materials frequently are referred to as " papers ";
• records of government agencies and other organizations, including such documents as parliamentary debates, proceedings of organization meetings, conferences, etc. Many of these materials frequently are referred to as " archives ";
• original documents such as birth certificates, marriage and baptismal registers, wills, trial transcripts, etc.;
• published materials written at the time of the event, including newspapers, news magazines, advertising, cartoons, and other ephemeral publications such as pamplets and flyers;
• contemporary creative works of literature, art, and music, such as novels, paintings, compositions, poems, etc.;
• contemporary photographs, maps, audio recordings, television and radio broadcasts, and moving pictures;
• Internet communications including email, listservs, and blogs;
• statistical and numeric data collected by various government and private agencies, including census data, opinion polls, and other surveys;
• research reports and case studies in the sciences or social sciences;
• artifacts of all kinds such as coins, clothing, fossils, furniture, and musical instruments from the time period under study

Primary sources sometimes can be ambiguous and contradictory, relecting a specific person's opinions and contemporary cultural influences on them. For that very reason such sources are invaluable tools for developing your own interpretations and reaching your own conclusions about what is going on at a point in time.

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• Last Updated: Mar 1, 2024 9:31 AM
• URL: https://guides.libraries.emory.edu/main/primary_sources_overview

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Information

Primary sources.

• What is a Primary Source
• Locating Primary Source Materials
• Using Primary Sources
• Digital Primary Sources
• Historic Newspapers
• Historic Census Data and Statistics
• Special Collections and Archives This link opens in a new window

What is a Primary Source?

Definition of Primary Sources:  

A primary source is a piece of evidence created during the time you are studying. These sources offer an eye-witness view of a particular event. They can be any type of format, as long as you as the researcher are looking for the source's context: Who made this, and what was their perspective? What other sources describe the same events? Whose perspective isn't represented, and where can you find it? What was the world like when this thing was made? With primary sources, you will ask a lot of questions!

Some common types of records used as primary sources include:

• Original Documents , including eyewitness accounts or the first record of events such as diaries, speeches, letters, manuscripts, interviews, news film footage, autobiographies, or official records
• Creative Works such as literature, music, art, film, etc.
• Relics or Artifacts such as pottery, furniture, clothing, and buildings
• Data from original research whether statistical or scientific

Remember: you have to find context for your primary sources.

What is a Secondary Source?

Definition of a secondary source:.

A secondary source interprets and analyzes primary sources. Secondary sources may have pictures, quotes or graphics of primary sources in them. Some common types of secondary sources include:

• A journal/magazine article which interprets or reviews previous findings 
• A history textbook 
• A book about the effects of WWI 
• Biographies
• Encyclopedia articles

Remember: a secondary source is making an argument based on research from other primary and secondary sources.

Primary Sources by Discipline

Different academic disciplines have different definitions of what constitutes a primary source:.

In the Humanities (history, literature, religion), primary sources focus on original documents or accounts contemporary to a specific event or an individual’s life. Terms such as “eyewitness” or “firsthand” are also commonly used to describe these sources. Autobiographical accounts written at a later date are also considered primary sources. Letters, diaries, journal entries, public records as well as contemporaneous newspapers articles offer solid examples of this type of primary source. Fictional works such as short stories or novels written during that specific time period constitute primary documents, too.

In the Arts (art, dance, music, theatre), primary sources are as diverse as the various disciplines in the category. They may include paintings, sculpture, prints, performances, video or audio recordings, scripts, or musical scores. Social Sciences (psychology, sociology, education) place a heavy emphasis on unanalyzed data sets as primary sources. Numerical data sets such as census figures, opinion polls, surveys or interview transcripts constitute this type of raw, uninterpreted data. A researcher’s field notes are also primary sources in the social sciences. In the Sciences (biology, ecology, chemistry), primary source documents focus on original research, ideas, or findings published in academic journals. These articles mark the first publication of such research; and they detail the researcher’s methodology and results. Plant or mineral samples and other artifacts are primary sources as well.

In STEM fields , primary sources may include papers or proceedings from scientific conferences; journal articles sharing original research, technical reports, patents, lab notes, and researcher correspondence or diaries.

Portions borrowed from Berea College Hutchins Library

• Next: Locating Primary Source Materials >>

Is it a primary source?

Are you using a primary source?

It depends on the questions you're asking!

Primary Resources Presentation Slides

Primary vs. secondary sources, differentiating primary and secondary sources in each discipline.

While primary sources offer a firsthand account, secondary sources are written after the fact. Secondary sources analyze, interpret, explain, or analyze a primary source, event or individual. These resources represent a second publication cycle, tasked with presenting an argument or to persuade the reader.

Borrowed from Indiana University Bloomington Libraries

• Last Updated: Jul 17, 2024 10:09 AM
• URL: https://guides.lib.wayne.edu/PrimarySources
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Primary Sources Guide

Understanding research sources.

• African American Studies
• Latin American & Latina/o Studies
• Native American & Indigenous Studies
• Evaluating Primary Sources
• Citing Primary Sources

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• What are Primary Sources?
• What are Secondary Sources?
• What are Tertiary Sources?

A primary source is a first-hand account from a person or organization who:

• Created an original work
• Participated in new scientific discoveries
• Witnessed an event

Some examples of primary sources include:

• Art and artifacts
• Autobiographies, diaries, and memoirs
• Interviews and oral histories
• Novels and poetry
• Photographs
• Data and surveys

Why are primary sources useful?  Primary sources are useful to:

• Observe and analyze an event from an eyewitness perspective
• Develop your own opinions and explanations
• Learn if you agree or disagree with the authors of secondary/tertiary sources and their conclusions

A secondary source has the following qualities:

• It comments on or analyzes something
• It often summarizes or interprets primary sources
• It's usually written by someone who was not directly involved or an eyewitness

Some examples of secondary sources include:

• Analysis or criticism, such as literary criticism
• Biographies
• Essays and reviews

Why are secondary sources useful? Secondary sources are useful because they:

• Help you consider diverse viewpoints about a topic
• Organize and outline information in an approachable way
• Offer information and analysis from experts

Remember, secondary sources are often based on studying and analyzing primary sources . Another way to think about it? Your research paper is a secondary source because you're analyzing and interpreting other sources.

A tertiary source has the following qualities:

• It lists and compiles information without additional analysis
• It repackages important ideas and information from other primary and secondary sources

Some examples of tertiary sources include:

• Directories of local, state, and national organizations
• Encyclopedias and dictionaries
• Guidebooks and handbooks

Why are tertiary sources useful? Tertiary sources are useful because they help you:

• Gather background information about a topic or concept
• Find a variety of information in one source
• Provide information in a concise and compact way

Examples of Primary Sources vs. Other Sources

• Communications

One area of study at Central Piedmont where primary sources are often used is History . Here are some examples:

• Primary Source = Autobiography :  Narrative of the Life of Frederick Douglass: An American Slave by Frederick Douglass
• Secondary Source = Biography :  Frederick Douglass: Prophet of Freedom by David W. Blight

Another area of study at Central Piedmont where primary sources often come into play is English . Here are some examples:

• Primary Source = Novel :  Love in the Time of Cholera by Gabriel García Márquez
• Secondary Source = Literary Criticism :  Gabriel García Márquez in Retrospect: A Collection Book , edited by Gene H. Bell-Villada

One other area of study at Central Piedmont where primary sources often come into play is Communications . Here are some examples:

• Primary Sources = Memoir :  Deaf Utopia: A Memoir--And a Love Letter to a Way of Life  by Nyle DiMarco
• Secondary Sources = Journal Article : "Curriculum and Instruction for Deaf and Hard of Hearing Students: Evidence from the Past—Considerations for the Future" (2023) by Maria C. Hartman, Elaine R. Smolen, and Brynne Powell
• Tertiary Sources = Reference Book :  American Sign Language: A Step-by-Step Guide to Signing by Suzie Chafin

Credit : Austin Community College's Primary Sources guide served as the inspiration and model for this LibGuide.

Additional Help

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• Last Updated: Jun 26, 2024 8:48 AM
• URL: https://researchguides.cpcc.edu/primary-sources

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Primary Sources: An Introduction: Home

Primary source research, primary sources at marquette, what is a primary source, is it a primary source, what are some examples of primary sources.

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Library Liaison for History, Philosophy, Political Science, & Theology

This is introductory description of what can be considered a primary source for the purposes of a research paper. Students and faculty have access to a wide range of primary source databases. It is highly recommended that student contact a liaison librarian for a research consultation when undertaking a research project using these sources. See the link below to set up a consult:

• Schedule a Research Consultation

There are many resources for primary source materials at Marquette. Physical examples of these include newspaper microfilms, government or non-profit reports, reproductions of historical documents or text, and published diaries or autobiographies. The link below connects to digitized primary sources databases that can accessed by Marquette students and faculty. Please use the research consultation link above for guidance on any of these materials. 

• Primary source digital collections at Marquette Primary source sigital collections are databases where the bulk of materials are documents and objects that provide first-hand documentation of events. Follow this link to view primary source digital collections at the library catalog where you can find database descriptions and links to connect to the databases themselves.
• Historical publication digital collection at Marquette Historical publication digital collections are databases where the bulk of their materials are printed texts published before 1900. Follow this link to view historical publication digital collections at the library catalog where you can find database descriptions and links to connect to the databases themselves.

A primary source is a first-hand or contemporary account of an event. Primary sources date to the time an event took place and offer original account or thoughts on a topic that has not been framed by second-hand interpretation. Primary sources are usually original materials, but they may be reproduced digitally or republished in a physical format.  

This guide from Fresno State University can help you determine if something is a Primary Source.  If you answer 'yes' to any of the following questions, the resource is most like a Primary Source. 

• Did the author personally witness or experience the subject in question?
• Does the author know about this subject because of personal experience rather than having just read about it?
• Is this source a diary, letter, memoir, autobiography, oral history, or interview of a person with first hand experience of the subject?
• Is this source an official document or record published at the time of the event by the government, courts, or another organization?
• Is this source a newspaper or magazine article written at the time of the event?
• Is this a creative work such as a novel, poem, art or music piece created by a firsthand witness of the subject in question?
• Is this an excerpt from a primary source, such as the constitution or a letter written by a Civil War soldier that has been imbedded in a secondary source, such as a textbook? Remember, secondary sources may include reprints of primary sources.
• Is this an artifact or relic such as jewelry, pottery, clothing, music, art, architecture, dance or weaponry that was used by witnesses of the subject in question?
• Is this a compilation of raw scientific data or statistics, such as census statistics published by the U.S. Census Bureau, that is being published without commentary or interpretation?
•  newspapers or other news accounts
•  personal accounts in diaries, letters, interviews, or oral histories
•  government documents or publications
•  speeches
•  photographs/ video footage
•  internal organizational documents
•  memoirs or autobiographies
•  novels, poems, or other works of art

Please note that, in the correct context, many things that are typically considered to be Secondary Sources - such as autobiographies or books about an event or historical period - can also be considered primary sources. For example, if you are writing an analysis of how historians have viewed a certain event over time, written histories on the event can be used as primary sources. 

• Last Updated: May 15, 2024 12:15 PM
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Primary Sources

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What are Primary and Secondary Sources?

Primary Sources Primary sources are the "materials on a topic upon which subsequent interpretations or studies are based, anything from firsthand documents such as poems, diaries, court records, and interviews to research results generated by experiments, surveys, ethnographies, and so on."*

Primary sources are records of events as they are first described, usually by witnesses or people who were involved in the event. Many primary sources were created at the time of the event but can also include memoirs, oral interviews, or accounts that were recorded later.  

Visual materials, such as photos, original artwork, posters, and films are important primary sources, not only for the factual information they contain, but also for the insight they may provide into how people view their world.   Primary sources may also include sets of data, such as census statistics, which have been tabulated but not interpreted. However, in the sciences or social sciences, primary sources report the results of an experiment. 

It can sometimes be difficult to determine whether a particular source is primary or secondary, because the same source can be a primary source for one topic and a secondary source for another topic.   David McCullough’s biography, John Adams , could be a secondary source for a paper about John Adams but a primary source for a paper about how various historians have interpreted the life of John Adams.

*From Hairston, Maxine and John J. Ruszkiewicz. The Scott, Foresman Handbook for Writers. 4th ed. New York: HarperCollins College Publishers, 1996, pg. 547.

Secondary Sources Secondary sources offer an analysis or a restatement of primary sources. They often attempt to describe or explain primary sources. Some secondary sources not only analyze primary sources, but also use them to argue a contention or persuade the reader to hold a certain opinion. Examples of secondary sources include dictionaries, encyclopedias, textbooks, and books and articles that interpret, analyze, or review research works.

More Examples of Primary and Secondary Sources

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Purdue Online Writing Lab Purdue OWL® College of Liberal Arts

What is Primary Research and How do I get Started?

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Primary research is any type of research that you collect yourself. Examples include surveys, interviews, observations, and ethnographic research. A good researcher knows how to use both primary and secondary sources in their writing and to integrate them in a cohesive fashion.

Conducting primary research is a useful skill to acquire as it can greatly supplement your research in secondary sources, such as journals, magazines, or books. You can also use it as the focus of your writing project. Primary research is an excellent skill to learn as it can be useful in a variety of settings including business, personal, and academic.

But I’m not an expert!

With some careful planning, primary research can be done by anyone, even students new to writing at the university level. The information provided on this page will help you get started.

What types of projects or activities benefit from primary research?

When you are working on a local problem that may not have been addressed before and little research is there to back it up.

When you are working on writing about a specific group of people or a specific person.

When you are working on a topic that is relatively new or original and few publications exist on the subject.

You can also use primary research to confirm or dispute national results with local trends.

What types of primary research can be done?

Many types of primary research exist. This guide is designed to provide you with an overview of primary research that is often done in writing classes.

Interviews: Interviews are one-on-one or small group question and answer sessions. Interviews will provide a lot of information from a small number of people and are useful when you want to get an expert or knowledgeable opinion on a subject.

Surveys: Surveys are a form of questioning that is more rigid than interviews and that involve larger groups of people. Surveys will provide a limited amount of information from a large group of people and are useful when you want to learn what a larger population thinks.

Observations: Observations involve taking organized notes about occurrences in the world. Observations provide you insight about specific people, events, or locales and are useful when you want to learn more about an event without the biased viewpoint of an interview.

Analysis: Analysis involves collecting data and organizing it in some fashion based on criteria you develop. They are useful when you want to find some trend or pattern. A type of analysis would be to record commercials on three major television networks and analyze gender roles.

Where do I start?

Consider the following questions when beginning to think about conducting primary research:

• What do I want to discover?
• How do I plan on discovering it? (This is called your research methods or methodology)
• Who am I going to talk to/observe/survey? (These people are called your subjects or participants)
• How am I going to be able to gain access to these groups or individuals?
• What are my biases about this topic?
• How can I make sure my biases are not reflected in my research methods?
• What do I expect to discover?

Top of page

Program Teachers

Finding primary sources.

The Library of Congress makes millions of unique primary sources available online to everyone, everywhere. There are a few different ways to discover the best primary sources for you.

Select from a curated set

Primary Source Sets – Each set collects primary sources on a specific frequently-taught topic, along with historical background information and teaching ideas.

Free to Use and Reuse Sets – Batches of primary sources on engaging topics.

U.S. History Primary Sources Timeline – Explore important topics and moments in U.S. history through historical primary sources from the Library’s collections.

Search the online collections

Successful searches of the online collections of the Library of Congress, as with any archival research institution, begin with an understanding of what is likely to be found. Many considerations, including copyright, collection strengths, and how materials were acquired, factor into what can be digitized and made available online. The Library’s online collections are extensive, but they do have limits, and are strongest in the nineteenth and early part of the twentieth century.

Use the search box at the top of the Library of Congress home page . A few tips:

• Before starting your search take a moment to make a list of possible search terms.
• Remember that different words or phrases may have been used to describe events or items in the past. For example: In the past the flu was sometimes known as the grippe.
• People or places may have been identified differently or may have used different names previously. For example: Eleanor Roosevelt may be known as Mrs. Franklin D. Roosevelt.
• There may be different spellings for names or places during the period you’re researching.
• Use the drop-down menu to the left of the search box to select a format, like Maps, before you search.
• To the left you will see a list of ways to narrow your search results. Scroll to the bottom to Access Condition and select “Available Online.”
• Scroll back to the top and narrow your search results using the facets to the left of your search results, like Date and Location.
• Select “Gallery” or “Grid” to change how you view the results. You can:
• increase the number of items you see at one time at the bottom of the page;
• change how the results are organized so they can be seen chronologically or in alphabetical order.
• Find an item that is of interest? On the item page look to the right and find the subject headings listed. You can click on those to see what other items are listed under that same subject heading.
• Explore related items at the bottom of the page.
• Additional search tips can be found on the Library’s Search Help page .

Explore online resources

Congress.gov – Explore current and historic information on bills, laws and the legislative branch of the government.

Chronicling America – Access historic newspapers from all fifty states and the District of Columbia for accounts of historic and everyday events as reported at the time they happened.

Check with the experts

Teaching with the Library blog – Short (500 words or less) posts featuring primary sources and teaching ideas.

Other Library blogs offer tips on finding Library resources, suggestions for other search terms or research ideas, and expert secondary information.

Today in History – Provides information and links to primary sources about a specific event in history.

Research Guides - In-depth guides to Library resources on a wide variety of topics.

Ask a Librarian – Send a question to a Library of Congress reference librarian. We're happy to help!

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Information For Students

I have to write a research paper using primary sources. where do i start.

• What is the difference between Primary and Secondary sources?
• How do I cite primary source materials?
• What are Special Collections and Archives?
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Primary sources are created by individuals who participated in or witnessed an event and recorded that event during or immediately after the event.

Explanation:

A student activist during the war writing about protest activities has created a memoir. This would be a primary source because the information is based on her own involvement in the events she describes. Similarly, an antiwar speech is a primary source. So is the arrest record of student protesters. A newspaper editorial or article, reporting on a student demonstration is also a primary source.

Deeds, wills, court documents, military records, tax records, census records, diaries, journals, letters, account books, advertisements, newspapers, photographs, and maps are primary sources.

Secondary sources are created by someone who was either not present when the event occurred or removed from it in time. We use secondary sources for overview information, and to help familiarize ourselves with a topic and compare that topic with other events in history.

History books, encyclopedias, historical dictionaries, and academic articles are secondary sources.

If you've never written a research paper using primary sources, it is important to understand that the process is different from using only secondary sources. Many students discover that finding and gaining access to primary source documents can be difficult. The Library website has a valuable guide to locating primary source documents. Follow the link below to be redirected to that guide:

https://libguides.furman.edu/resources/primary-sources

• Students are encouraged to seek help from the Special Collections Librarian or Research Librarians to aid in their research projects. Librarians will be able to aid students in a variety of ways including helping to locate primary source materials.

After locating appropriate primary sources, it is necessary for students to analyze and interpret them. To many students, this task can seem arduous, if not overwhelming. There are many resources available in the library as well as online, which are helpful. The National Archives website has very useful analysis worksheets that can help students to determine the significance of primary source documents. Links to PDF files of these worksheets are listed below:

Written Document | Artifact | Cartoon | Map | Motion Picture | Photograph | Poster | Sound Recording

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• Finding and Using Primary Sources
• Getting Started

Finding and Using Primary Sources: Getting Started

• Online Collections
• Books & Ebooks
• Magazines & Journals
• Data & Stats
• Citing Primary Sources

Ask a Librarian

Need Help?   Ask a Librarian for help finding primary sources in the library. 

Librarians are available from 9am to 12am most days to help you with your research. You can reach us in person, via chat, phone, or email.

Primary sources are those created contemporaneously to whatever period a researcher is studying. In contrast to secondary sources, they don't provide any analysis on a given topic after the fact; instead, they reflect on information or events as they unfolded (for example, a newspaper article, from the time of a particular historical event, discussing the historical event as it happened). Primary sources are especially useful for researchers because they reveal how certain topics and ideas were understood during a specific time and place. The particular primary sources you might use in your research, as well as how you find them, can vary a lot based on your field of study. This guide aims to provide helpful information on where to go about searching for primary sources, both at Duke and beyond.

Examples of Primary Sources (explore the other tabs for more info):

• Photographs
• Government records
• Pamphlets and other ephemeral material
• Memoirs and autobiographies

Location-Specific Resources

This guide is meant to cover primary sources in a generalized way. Duke Libraries also has a collection of guides that go over primary sources based on location. Check these out if you're looking for primary sources related to a particular history or place! Keep in mind, too, that many of our subject guides also provide some information about accessing primary sources related to specific subjects.

Location-Specific Primary Source Guides at Duke:

• Primary Sources - Africa
• Primary Sources - Asia
• Primary Sources - Global British
• Primary Sources - Latin America/Caribbean
• Primary Sources - Middle East
• Primary Sources - North America
• Primary Sources - Western Europe

Created in 2021 by Anna Twiddy and Kaylee Alexander.

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• Last Updated: Mar 4, 2024 2:18 PM
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Educator Resources

Finding Primary Sources for Teachers and Students

Finding primary sources.

Primary Sources from DocsTeach Thousands of online primary source documents from the National Archives to bring the past to life as classroom teaching tools.

National Archives Catalog Find online primary source materials for classroom & student projects from the National Archive's online catalog (OPA).

Beginning Research Activities Student activities designed to help you navigate the National Archives resources and web site.

Online Exhibits Exhibits featuring online documents, photos and primary sources from the National Archives

Our Documents 100 Milestone Documents of American History

Getting Started with Research How to start researching records at the National Archives. Finding your topic, identifying records, planning a visit, and more.

Online Research Tools & Aids Introduction to catalogs, databases, and other online resources.

Citing Primary Sources Citing Records in the National Archives of the United States

Reference management. Clean and simple.

Primary and secondary sources: what are they and why do I need them?

What are the main differences between primary and secondary sources?

Why do i need to use both primary and secondary sources in my research, examples of primary and secondary sources, frequently asked questions about primary and secondary sources, related articles.

Primary and secondary sources are the two main types of source materials that you will use for your research project. They are both important and needed for your project. Whether you are going to use more primary or more secondary sources depends on your academic level - undergrad, postgrad, or professional.

Both types of sources have importance and merits of their own, but they are also immensely different. This guide will help you understand the differences. If you want to learn even more about both source types separately, where and how you can access them, and when and how to use them, check out the links below:

➡️  What is a primary source?

➡️  What is a secondary source?

The main difference between primary and secondary sources is that primary sources are contemporary.

Primary sources are original and originated from the event they refer to. They are not reviews, analyses, or critiques of events that occurred in the past. They are first-hand information.

Secondary sources are summaries, critiques, opinions, and analyses. They are written by people who did not witness, or have any direct part to play in the event they are describing. The information they contain is based on primary sources and is the author’s interpretation of the event/subject they are covering.

Using both types of sources adds to the merit of your research. By including references to secondary sources , you are showing that you have truly engaged with your research topic. You are providing extra information and displaying a well-rounded approach to your topic. You are not relying solely on the work of one person, or one institution, for your analysis to be based upon. You are reading broadly and contextually.

Likewise, including primary source references in your research shows that you are also going back to the roots. You are looking at the event or object as it happened, without being able to teleport through time and space. A primary source is vital because it will enable you to make your own judgement on an event or object. Secondary sources are always biased, in one sense or another, so engaging with the primary source yourself allows you to view the topic objectively.

Primary and secondary sources complement each other - looking at both can give you a deeper understanding of each. A primary source can help you to evaluate a secondary source - you will notice aspects of it which the author dismisses, or washes over in their discussion. Likewise, a secondary source can tell you about current trends in research and analysis, while providing you with a broad overview or summary of an extended period of time, or the works of an artist.

We have put together a list of examples of primary and secondary sources by fields of study. It will help you identify the nature of your source.

Primary sources are original and originated from the event they refer to. They are not reviews, analyses, or critiques of events that occurred in the past. They are first-hand information. For a more detailed description of what a primary source is, where you can access them, and why you need to use them, see this article about primary sources .

Secondary sources are summaries, critiques, opinions, and analyses. They are written by people who did not witness, or have any direct part to play in the event they are describing. The information they contain is based on primary sources, and is the author’s interpretation of the event/subject they are covering. See this article about secondary sources for further information.

Some examples of primary sources are: Poems, diaries, letters, paintings, government records, maps, interviews (transcribed or recorded), photographs, newspaper articles, results of experiments, case studies, results of clinical trials, minutes of meetings, and proceedings of conferences

Some examples of secondary sources are: Biographies, histories, reviews, encyclopaedias, literary criticism, discussions of importance, analysis of clinical trials, and reviews of results.

The one main difference between primary and secondary sources is that primary sources are contemporary and secondary sources are not.

Start your research in the Archives with primary source documents - tutorial

About this tutorial.

Doing research in the Archives and Special Collections at the University of Minnesota is more than just finding an old document. You will need some skills to effectively investigate and explore everything you find.

After completing this tutorial, you will be able to:

• Understand the importance of using primary sources in your research
• Recognize the features of a primary source
• Apply the Research, Review, Reflect, and Record process to be more successful in all of your research

What are primary sources?

Primary sources are the “raw material” of history

Primary sources are created in the past and have historical research value

Primary sources help you understand past events from a firsthand or insider perspective

Primary sources aren’t just old books, letters, or diaries. They include the full range of human communication and expression, from cuneiform tablets to posters to PDF files.

For any assignment, it is important to use your instructor's definition of primary sources.

Why use primary sources?

• contextualize historical topics
• give history a voice
• allow you to interrogate and question common historical beliefs and narratives
• are an opportunity to form your own interpretation rather than read someone else’s
• help you get more out of sources, such as books or scholarly articles, by providing additional layers of information
• Finally, they help make your research unique and more enjoyable to write and read!

Their formats may be unfamiliar. For example, what is a telegram?

Their language and imagery may be different or even offensive

Use a process to help with your research

Next, learn about a process called Research, Review, Reflect, and Record to help with your research.

Philosophy: A Guide to Research

• About this Guide
• Getting Started with Research
• Finding Peer-Reviewed Articles

Primary & Secondary Sources

Tips for finding primary sources, books in milne library's reference collection, databases available through milne library, websites for primary sources.

• Finding a Book at Milne Library
• Citations This link opens in a new window
• Get Library Help
• Self-Guided Tour of the James M. Milne Library
• SUNY Oneonta Philosophy Department This link opens in a new window

Primary sources  are documents or objects that provide direct, first-hand evidence. A secondary source  analyzes, discusses, summarizes, and comments upon primary sources. Secondary sources are one step removed from the original, primary source.

Disciplines define primary sources differently. To the scientist, they might be reports of original research or personal papers; to the journalist, they might be interviews or letters. 

In Philosophy, examples of primary sources can include:

• philosophical texts, treatises, meditations 
• personal narratives, diaries, memoirs, correspondence, letters

( Primary Sources - Philosophy - Subject Guides at University of Alberta Libraries (ualberta.ca)  available under a  Creative Commons — Attribution-NonCommercial-ShareAlike 4.0 International — CC BY-NC-SA 4.0 ) 

Examples of secondary sources include:

• biographies
• critical analysis
• second-person account
• historical study 
• journal article summarizing or examining previous findings

Primary sources may be available in print, in library databases, on websites, or in microform collections. Print primary sources, or print reproductions of primary sources, are sometimes available in archives and libraries.  In addition, primary sources are increasingly found online in digitized form. These may be found in library databases or on websites. Primary sources are also available in m icroform, a format that has been used for many years to preserve documents, as well as to save storage space. 

Tips for finding primary sources:

When searching print and online access tools use search terms such as SOURCES , CORRESPONDENCE , PERSONAL NARRATIVES , DIARIES , RECORDS AND CORRESPONDENCE , SERMONS , SPEECHES , PAPERS , LETTERS.

Look for titles of primary sources in secondary sources and in lists included in bibliographies of secondary sources. Use text, class, and library bibliographies for recommended titles or listings of primary sources.

Browse library shelves around other relevant books. This is often a wonderful way to discover collections of primary sources that have been published in a book format.

On this guide you will find a partial listing of primary source materials available in Milne Library. This includes a listing of reference books , databases , websites , and  microform collections containing primary source materials.  Remember, this is only a partial listing.  More primary sources can be found through searching print and online access tools and browsing the library shelves in relevant areas.

Below is a  partial  listing of books in Milne Library’s Reference Collection that may be helpful for primary source research. Some titles only list sources, whereas others include the text of sources. Note the call number below each title. These items cannot be checked out. However,  students can request free photocopy of pages in print reference sources at the Research Help Desk . Staff members will attempt to make copies at the time of the request, but students should generally expect to pick up photocopies one or two days after the request has been submitted. A scanner is also available in the reference area for copying information. Assistance is available at the Research Help Desk.

Below are some databases that may be helpful for primary source research. Some databases only list sources, whereas others include the full text of sources. All of the following databases are listed on the library website alphabetically by title under the Databases tab .

• American Antiquarian Society (AAS) Historical Periodicals Collection: Series 1 This link opens in a new window Consists of over 850,000 pages including the full-text of almost every seventeenth- and eighteenth-century American title published before 1821. Areas covered include Afro-Americana, children's literature, education, eighteenth-century imprints, leisure and hobbies, medicine, religion, the trades, and women's literature.
• American Antiquarian Society (AAS) Historical Periodicals Collection: Series 2 This link opens in a new window Presents over 1000 full-text titles dating from 1821 through 1837. Areas covered include agriculture, entertainment, history, literary criticism, and politics.
• American Antiquarian Society (AAS) Historical Periodicals Collection: Series 4 This link opens in a new window Provides a diverse record of life leading up to and during the Civil War, from 1853-1865. News from the battlefront can be found in addition to science, literature, medicine, agriculture, women’s fashion, family life, and religion.

Analyze the history of Latin America and the Caribbean from the sixteenth through twentieth century through primary source documents.

• China: Trade, Politics and Culture 1793-1980 This link opens in a new window English-language sources relating to China and the West, 1793-1980. Manuscripts encompassing events from the earliest English embassy to the birth and early years of the People’s Republic. Sources describing the lives and work of missionaries in China from 1869-1970.
• European Views of the Americas: 1493 to 1750 This link opens in a new window EBSCO Publishing, in cooperation with the John Carter Brown Library, created this resource from "European Americana: A Chronological Guide to Works Printed In Europe Relating to The Americas, 1493-1750". Contains more than 32,000 entries. Index only.
• Historic Documents This link opens in a new window For more than 40 years, Historic Documents has made primary source research easy by presenting excerpts from documents on the important events of each year for the United States and the world. Each volume includes approximately 70 events with well over 100 documents from the previous year, from official or other influential reports and surveys, to speeches from leaders and opinion makers, to court cases, legislation, testimony, and much more. Full-source citations are provided. Readers have easy access to material through a detailed, thematic table of contents and a cumulative five-year index that directs them to related material in earlier volumes. This page contains the most recent and past editions of Historic Documents.
• JSTOR 19th-Century British Pamphlets This link opens in a new window Created by Research Libraries UK. Contains the most significant British pamphlets from the 19th century held in UK research libraries. Pamphlets cover the key political, social, technological, and environmental issues of their day.
• LitFinder: Primary Sources & Literary Works This link opens in a new window Resource for full-text literary works, including poems, short stories, novels, essays, plays and speeches.
• Maps of New York: Paul Baumann Archive 260 maps --USGS (United States Geological Survey) 15 Minute Quadrangle series of New York State. Over the years many of the maps in this series have deteriorated due to usage and time and other maps have just disappeared. These maps were produced between 1895 and 1955 and predate the current 7 ½ Minute Quadrangle series. They represent a great geographical and historical resource for understanding the nature of the state and its many communities. Open access

• New York State Historic Newspapers The NYS Historic Newspapers project provides free online access to a wide range of newspapers chosen to reflect New York's unique history. Use the Search Tab to search the entire collection, or click on a county to search or browse geographically.
• New York Times This link opens in a new window All students and faculty have unlimited access to The New York Times digital platforms, including personalized user experience, live coverage of breaking news, access to NYT articles between 1851-current, access to the International edition and Canadian, Chinese, and Spanish editions, full access to the NYT Learning Network, and access to the InEducation resource that helps faculty bring current events into the classroom. This resource includes access to archival content and replaces Historical New York Times and N ew York Times Archive . more... less... Once activated, a faculty/staff pass is valid for 1460 days. A student pass is valid up to the graduation year they enter when they sign up for a pass. After the pass expires, faculty and staff can easily renew their access by re-entering their email address at http://accessnyt.com.
• Readers' Guide Retrospective, 1890-1992 This link opens in a new window Provides indexing of over three million articles from more than 550 leading magazines including full coverage of the original print volumes of Readers’ Guide to Periodical Literature. This resource offers researchers access to information about history, culture and seminal developments across nearly a century. Readers’ Guide Retrospective: 1890-1982 includes all the information from 44 Readers’ Guide to Periodical Literature annuals, as well as access to over three million articles from approximately 550 leading magazines.
• Times Digital Archive: 1785-2019 This link opens in a new window The Times Digital Archive is a fully searchable database of The Times (of London) newspaper.
• Victorian Popular Culture Despite the name, Victorian Popular Culture provides access to a wide range of primary source material related to popular entertainment in America and Europe in the period from 1779 to 1930.

Primary sources are increasingly found online in digitized form.  Listed below are some websites that contain primary source materials.  Consult your instructor on whether you are allowed to use primary source materials available via websites.

• Chronicling America: Historic American Newspapers (Library of Congress) - Search select American historic newspaper pages from 1836-1922 or use the U.S. Newspaper Directory to find information about American newspapers published between 1690-present.
• Digital Public Library of America - Virtual library of millions of items from 2,000 American libraries, archives, and museums documenting American cultural heritage. Can search and scan through the united collection of millions of items, including by timeline, map, format, subject, and partner.
• Internet History Sourcebooks Project  (Fordham University) - A collection of public domain and copy-permitted historical texts presented cleanly (without advertising or excessive layout) for educational use.
• New York Heritage Digital Collections  - Provides free access to more than 170 distinct digital collections, totaling hundreds of thousands of items representing a broad range of historical, scholarly, and cultural materials held in libraries, museums, and archives throughout the state. Collection items include photographs, letters, diaries, directories, maps, newspapers, books, and more.
• World Digital Library - Makes available on the Internet, free of charge and in multilingual format, significant primary materials from all countries and cultures.
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• Student Services
• Faculty Services

Peer Review and Primary Literature: An Introduction: Is it Primary Research? How Do I Know?

• Scholarly Journal vs. Magazine
• Peer Review: What is it?
• Finding Peer-Reviewed Articles
• Primary Journal Literature
• Is it Primary Research? How Do I Know?

Components of a Primary Research Study

As indicated on a previous page, Peer-Reviewed Journals also include non -primary content. Simply limiting your search results in a database to "peer-reviewed" will not retrieve a list of only primary research studies.

Learn to recognize the parts of a primary research study. Terminology will vary slightly from discipline to discipline and from journal to journal.  However, there are common components to most research studies.

When you run a search, find a promising article in your results list and then look at the record for that item (usually by clicking on the title). The full database record for an item usually includes an abstract or summary--sometimes prepared by the journal or database, but often written by the author(s) themselves. This will usually give a clear indication of whether the article is a primary study.  For example, here is a full database record from a search for family violence and support in SocINDEX with Full Text :

Although the abstract often tells the story, you will need to read the article to know for sure. Besides scanning the Abstract or Summary, look for the following components: (I am only capturing small article segments for illustration.)

Look for the words METHOD or METHODOLOGY . The authors should explain how they conducted their research.

NOTE: Different Journals and Disciplines will use different terms to mean similar things. If instead of " Method " or " Methodology " you see a heading that says " Research Design " or " Data Collection ," you have a similar indicator that the scholar-authors have done original research.

  

Look for the section called RESULTS . This details what the author(s) found out after conducting their research.

Charts , Tables , Graphs , Maps and other displays help to summarize and present the findings of the research.

A Discussion indicates the significance of findings, acknowledges limitations of the research study, and suggests further research.

References , a Bibliography or List of Works Cited indicates a literature review and shows other studies and works that were consulted. USE THIS PART OF THE STUDY! If you find one or two good recent studies, you can identify some important earlier studies simply by going through the bibliographies of those articles.

A FINAL NOTE:  If you are ever unclear about whether a particular article is appropriate to use in your paper, it is best to show that article to your professor and discuss it with them.  The professor is the final judge since they will be assigning your grade.

Subject Guide

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• Last Updated: Nov 16, 2022 12:46 PM
• URL: https://suffolk.libguides.com/PeerandPrimary

• Writing Center

Beginner’s Guide to Research

Click here to download a .pdf copy of our Beginner’s Guide to Research !

Last updated : July 18, 2024

Consider keeping a printed copy to have when writing and revising your resume!  If you have any additional questions, make an appointment or email us at [email protected] !

Most professors will require the use of academic (AKA peer-reviewed) sources for student writing. This is because these sources, written for academic audiences of specific fields, are helpful for developing your argument on many topics of interest in the academic realm, from history to biology. While popular sources like news articles also often discuss topics of interest within academic fields, peer-reviewed sources offer a depth of research and expertise that you cannot find in popular sources. Therefore, knowing how to (1) identify popular vs. academic sources, (2) differentiate between primary and secondary sources, and (3) find academic sources is a vital step in writing research. Below are definitions of the two ways scholars categorize types of sources based on when they were created (i.e. time and place) and how (i.e. methodology):

Popular vs. academic sources:

• Popular sources are publicly accessible periodicals–newspapers, magazines, and blogs–such as The Washington Post or The New Yorker . These sources are most often written for non-academic audiences, but can be helpful for finding general information and a variety of opinions on your topic.
• Academic sources , known also as peer reviewed or scholarly articles, are those that have undergone peer review before being published. Typically, these articles are written for other scholars in the field and are published in academic journals, like Feminist Studies or The American Journal of Psychology . Literature reviews, research projects, case studies, and notes from the field are common examples.

Primary vs. secondary sources:

• Primary sources are articles written by people directly involved in what they were writing about, including: News reports and photographs, diaries and novels, films and videos, speeches and autobiographies, as well as original research and statistics.
• Secondary sources , on the other hand, are second hand accounts written about a topic based on primary sources. Whether a journal article or other academic publication is considered a secondary source depends on how you use it.

How to Find Academic Sources

Finding appropriate academic sources from the hundreds of different journal publications can be daunting. Therefore, it is important to find databases –digital collections of articles–relevant to your topic to narrow your search. Albertson’s Library has access to several different databases, which can be located by clicking the “Articles and Databases” tab on the website’s homepage, and navigating to “Databases A-Z” to refine your search. Popular databases include: Academic Search Premier and Proquest Central (non-specific databases which include a wide variety of articles), JSTOR (humanities and social sciences, from literature to history), Web of Science (formal sciences and natural sciences such as biology and chemistry), and Google Scholar (a web search engine that searches scholarly literature and academic sources). If you are unable to access articles from other databases, make sure you’re signed in to Alberton’s Library through Boise State!

Performing a Database Search

Databases include many different types of sources besides academic journals, however, including book reviews and other periodicals. Using the search bar , you can limit search results to those containing specific keywords or phrases like “writing center” or “transfer theory.” Utilizing keywords in your search–names of key concepts, authors, or ideas–rather than questions is the most effective way to find articles in databases. When searching for a specific work by title, placing the title in quotation marks will ensure your search includes only results in that specific word order. In the example below, search terms including the author (“Virginia Woolf”) and subject (“feminism”) are entered into the popular database EBSCOhost:

Refining Your Search Results

Many databases have a bar on the left of the screen where you can further refine your results. For example, if you are only interested in finding complete scholarly articles, or peer-reviewed ones, you can toggle these different options to further limit your search. These options are located under the “Refine Results” bar in EBSCOhost, divided into different sections, with a display of currently selected search filters and filter options to refine your search based on your specific needs, as seen in the figure below:

Search results can also be limited by subject : If you search “Romeo and Juliet” on Academic Search Premier to find literary analysis articles for your English class, you’ll find a lot of other sources that include this search term, such as ones about theater production or ballets based on Shakespeare’s play. However, if you’re writing a literary paper on the text of the play itself, you might limit your search results to “fiction” to see only articles that discuss the play within the field of literature. Alternatively, for a theater class discussing the play, you might limit your search results to “drama.”

The Writing Center

How to Write a Research Proposal: (with Examples & Templates)

Table of Contents

Before conducting a study, a research proposal should be created that outlines researchers’ plans and methodology and is submitted to the concerned evaluating organization or person. Creating a research proposal is an important step to ensure that researchers are on track and are moving forward as intended. A research proposal can be defined as a detailed plan or blueprint for the proposed research that you intend to undertake. It provides readers with a snapshot of your project by describing what you will investigate, why it is needed, and how you will conduct the research.  

Your research proposal should aim to explain to the readers why your research is relevant and original, that you understand the context and current scenario in the field, have the appropriate resources to conduct the research, and that the research is feasible given the usual constraints.  

This article will describe in detail the purpose and typical structure of a research proposal , along with examples and templates to help you ace this step in your research journey.  

What is a Research Proposal ?  

A research proposal¹ ,²  can be defined as a formal report that describes your proposed research, its objectives, methodology, implications, and other important details. Research proposals are the framework of your research and are used to obtain approvals or grants to conduct the study from various committees or organizations. Consequently, research proposals should convince readers of your study’s credibility, accuracy, achievability, practicality, and reproducibility.   

With research proposals , researchers usually aim to persuade the readers, funding agencies, educational institutions, and supervisors to approve the proposal. To achieve this, the report should be well structured with the objectives written in clear, understandable language devoid of jargon. A well-organized research proposal conveys to the readers or evaluators that the writer has thought out the research plan meticulously and has the resources to ensure timely completion.  

Purpose of Research Proposals  

A research proposal is a sales pitch and therefore should be detailed enough to convince your readers, who could be supervisors, ethics committees, universities, etc., that what you’re proposing has merit and is feasible . Research proposals can help students discuss their dissertation with their faculty or fulfill course requirements and also help researchers obtain funding. A well-structured proposal instills confidence among readers about your ability to conduct and complete the study as proposed.  

Research proposals can be written for several reasons:³  

• To describe the importance of research in the specific topic  
• Address any potential challenges you may encounter  
• Showcase knowledge in the field and your ability to conduct a study  
• Apply for a role at a research institute  
• Convince a research supervisor or university that your research can satisfy the requirements of a degree program  
• Highlight the importance of your research to organizations that may sponsor your project  
• Identify implications of your project and how it can benefit the audience  

What Goes in a Research Proposal?    

Research proposals should aim to answer the three basic questions—what, why, and how.  

The What question should be answered by describing the specific subject being researched. It should typically include the objectives, the cohort details, and the location or setting.  

The Why question should be answered by describing the existing scenario of the subject, listing unanswered questions, identifying gaps in the existing research, and describing how your study can address these gaps, along with the implications and significance.  

The How question should be answered by describing the proposed research methodology, data analysis tools expected to be used, and other details to describe your proposed methodology.   

Research Proposal Example  

Here is a research proposal sample template (with examples) from the University of Rochester Medical Center. 4 The sections in all research proposals are essentially the same although different terminology and other specific sections may be used depending on the subject.  

Structure of a Research Proposal  

If you want to know how to make a research proposal impactful, include the following components:¹  

1. Introduction  

This section provides a background of the study, including the research topic, what is already known about it and the gaps, and the significance of the proposed research.  

2. Literature review  

This section contains descriptions of all the previous relevant studies pertaining to the research topic. Every study cited should be described in a few sentences, starting with the general studies to the more specific ones. This section builds on the understanding gained by readers in the Introduction section and supports it by citing relevant prior literature, indicating to readers that you have thoroughly researched your subject.  

3. Objectives  

Once the background and gaps in the research topic have been established, authors must now state the aims of the research clearly. Hypotheses should be mentioned here. This section further helps readers understand what your study’s specific goals are.  

4. Research design and methodology  

Here, authors should clearly describe the methods they intend to use to achieve their proposed objectives. Important components of this section include the population and sample size, data collection and analysis methods and duration, statistical analysis software, measures to avoid bias (randomization, blinding), etc.  

5. Ethical considerations  

This refers to the protection of participants’ rights, such as the right to privacy, right to confidentiality, etc. Researchers need to obtain informed consent and institutional review approval by the required authorities and mention this clearly for transparency.  

6. Budget/funding  

Researchers should prepare their budget and include all expected expenditures. An additional allowance for contingencies such as delays should also be factored in.  

7. Appendices  

This section typically includes information that supports the research proposal and may include informed consent forms, questionnaires, participant information, measurement tools, etc.  

8. Citations  

Important Tips for Writing a Research Proposal  

Writing a research proposal begins much before the actual task of writing. Planning the research proposal structure and content is an important stage, which if done efficiently, can help you seamlessly transition into the writing stage. 3,5  

The Planning Stage  

• Manage your time efficiently. Plan to have the draft version ready at least two weeks before your deadline and the final version at least two to three days before the deadline.
• What is the primary objective of your research?  
• Will your research address any existing gap?  
• What is the impact of your proposed research?  
• Do people outside your field find your research applicable in other areas?  
• If your research is unsuccessful, would there still be other useful research outcomes?  

  The Writing Stage  

• Create an outline with main section headings that are typically used.  
• Focus only on writing and getting your points across without worrying about the format of the research proposal , grammar, punctuation, etc. These can be fixed during the subsequent passes. Add details to each section heading you created in the beginning.   
• Ensure your sentences are concise and use plain language. A research proposal usually contains about 2,000 to 4,000 words or four to seven pages.  
• Don’t use too many technical terms and abbreviations assuming that the readers would know them. Define the abbreviations and technical terms.  
• Ensure that the entire content is readable. Avoid using long paragraphs because they affect the continuity in reading. Break them into shorter paragraphs and introduce some white space for readability.  
• Focus on only the major research issues and cite sources accordingly. Don’t include generic information or their sources in the literature review.  
• Proofread your final document to ensure there are no grammatical errors so readers can enjoy a seamless, uninterrupted read.  
• Use academic, scholarly language because it brings formality into a document.  
• Ensure that your title is created using the keywords in the document and is neither too long and specific nor too short and general.  
• Cite all sources appropriately to avoid plagiarism.  
• Make sure that you follow guidelines, if provided. This includes rules as simple as using a specific font or a hyphen or en dash between numerical ranges.  
• Ensure that you’ve answered all questions requested by the evaluating authority.  

Key Takeaways   

Here’s a summary of the main points about research proposals discussed in the previous sections:  

• A research proposal is a document that outlines the details of a proposed study and is created by researchers to submit to evaluators who could be research institutions, universities, faculty, etc.  
• Research proposals are usually about 2,000-4,000 words long, but this depends on the evaluating authority’s guidelines.  
• A good research proposal ensures that you’ve done your background research and assessed the feasibility of the research.  
• Research proposals have the following main sections—introduction, literature review, objectives, methodology, ethical considerations, and budget.  

Frequently Asked Questions  

Q1. How is a research proposal evaluated?  

A1. In general, most evaluators, including universities, broadly use the following criteria to evaluate research proposals . 6  

• Significance —Does the research address any important subject or issue, which may or may not be specific to the evaluator or university?  
• Content and design —Is the proposed methodology appropriate to answer the research question? Are the objectives clear and well aligned with the proposed methodology?  
• Sample size and selection —Is the target population or cohort size clearly mentioned? Is the sampling process used to select participants randomized, appropriate, and free of bias?  
• Timing —Are the proposed data collection dates mentioned clearly? Is the project feasible given the specified resources and timeline?  
• Data management and dissemination —Who will have access to the data? What is the plan for data analysis?  

Q2. What is the difference between the Introduction and Literature Review sections in a research proposal ?  

A2. The Introduction or Background section in a research proposal sets the context of the study by describing the current scenario of the subject and identifying the gaps and need for the research. A Literature Review, on the other hand, provides references to all prior relevant literature to help corroborate the gaps identified and the research need.  

Q3. How long should a research proposal be?  

A3. Research proposal lengths vary with the evaluating authority like universities or committees and also the subject. Here’s a table that lists the typical research proposal lengths for a few universities.  

	Arts programs	1,000-1,500
University of Birmingham	Law School programs	2,500
	PhD	2,500
		2,000
	Research degrees	2,000-3,500

Q4. What are the common mistakes to avoid in a research proposal ?  

A4. Here are a few common mistakes that you must avoid while writing a research proposal . 7  

• No clear objectives: Objectives should be clear, specific, and measurable for the easy understanding among readers.  
• Incomplete or unconvincing background research: Background research usually includes a review of the current scenario of the particular industry and also a review of the previous literature on the subject. This helps readers understand your reasons for undertaking this research because you identified gaps in the existing research.  
• Overlooking project feasibility: The project scope and estimates should be realistic considering the resources and time available.   
• Neglecting the impact and significance of the study: In a research proposal , readers and evaluators look for the implications or significance of your research and how it contributes to the existing research. This information should always be included.  
• Unstructured format of a research proposal : A well-structured document gives confidence to evaluators that you have read the guidelines carefully and are well organized in your approach, consequently affirming that you will be able to undertake the research as mentioned in your proposal.  
• Ineffective writing style: The language used should be formal and grammatically correct. If required, editors could be consulted, including AI-based tools such as Paperpal , to refine the research proposal structure and language.  

Thus, a research proposal is an essential document that can help you promote your research and secure funds and grants for conducting your research. Consequently, it should be well written in clear language and include all essential details to convince the evaluators of your ability to conduct the research as proposed.  

This article has described all the important components of a research proposal and has also provided tips to improve your writing style. We hope all these tips will help you write a well-structured research proposal to ensure receipt of grants or any other purpose.  

References  

• Sudheesh K, Duggappa DR, Nethra SS. How to write a research proposal? Indian J Anaesth. 2016;60(9):631-634. Accessed July 15, 2024. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5037942/  
• Writing research proposals. Harvard College Office of Undergraduate Research and Fellowships. Harvard University. Accessed July 14, 2024. https://uraf.harvard.edu/apply-opportunities/app-components/essays/research-proposals  
• What is a research proposal? Plus how to write one. Indeed website. Accessed July 17, 2024. https://www.indeed.com/career-advice/career-development/research-proposal  
• Research proposal template. University of Rochester Medical Center. Accessed July 16, 2024. https://www.urmc.rochester.edu/MediaLibraries/URMCMedia/pediatrics/research/documents/Research-proposal-Template.pdf  
• Tips for successful proposal writing. Johns Hopkins University. Accessed July 17, 2024. https://research.jhu.edu/wp-content/uploads/2018/09/Tips-for-Successful-Proposal-Writing.pdf  
• Formal review of research proposals. Cornell University. Accessed July 18, 2024. https://irp.dpb.cornell.edu/surveys/survey-assessment-review-group/research-proposals  
• 7 Mistakes you must avoid in your research proposal. Aveksana (via LinkedIn). Accessed July 17, 2024. https://www.linkedin.com/pulse/7-mistakes-you-must-avoid-your-research-proposal-aveksana-cmtwf/  

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The Data That Powers A.I. Is Disappearing Fast

New research from the Data Provenance Initiative has found a dramatic drop in content made available to the collections used to build artificial intelligence.

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By Kevin Roose

Reporting from San Francisco

For years, the people building powerful artificial intelligence systems have used enormous troves of text, images and videos pulled from the internet to train their models.

Now, that data is drying up.

Over the past year, many of the most important web sources used for training A.I. models have restricted the use of their data, according to a study published this week by the Data Provenance Initiative, an M.I.T.-led research group.

The study , which looked at 14,000 web domains that are included in three commonly used A.I. training data sets, discovered an “emerging crisis in consent,” as publishers and online platforms have taken steps to prevent their data from being harvested.

The researchers estimate that in the three data sets — called C4, RefinedWeb and Dolma — 5 percent of all data, and 25 percent of data from the highest-quality sources, has been restricted. Those restrictions are set up through the Robots Exclusion Protocol, a decades-old method for website owners to prevent automated bots from crawling their pages using a file called robots.txt.

The study also found that as much as 45 percent of the data in one set, C4, had been restricted by websites’ terms of service.

“We’re seeing a rapid decline in consent to use data across the web that will have ramifications not just for A.I. companies, but for researchers, academics and noncommercial entities,” said Shayne Longpre, the study’s lead author, in an interview.

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• Jul 25 2024

UK researcher wins award for outstanding review paper in advancing food science

Akinbode Adedeji , an associate professor at the  Department of Biosystems and Agricultural Engineering  (BAE) at University of Kentucky Martin-Gatton CAFE, and two fellow researchers have been awarded the prestigious Tanner Award for their seminal review paper on plant protein modification. This accolade is granted to the authors of the most cited paper by the Institute of Food Technologists (IFT) in a particular year, reflecting the significant impact and contribution to the field of food science. 

The award-winning paper titled  “Modification of Plant Proteins for Improved Functionality: A Review”  has garnered widespread recognition since its publication in Comprehensive Reviews in Food Science and Food Safety in 2021. It has been cited over 300 times, making it the most cited paper across all IFT journals that year. The work was co-authored by Adedeji along with then-UK doctoral student Felix Akharume and Rotimi Aluko from the University of Manitoba. 

What plant protein modification means for researchers? 

The review profiles various methods used to modify plant proteins, emphasizing physical, chemical and biochemical approaches. Adedeji said the work stood out for its comprehensive evaluation of techniques to enhance the quality and functional properties of plant proteins.   This included improving solubility, emulsification, gelation and foaming properties, which are crucial for developing high-quality plant-based food products. 

“Our goal was to develop a key understanding of the proteins from plant sources, focusing on their quality and functional properties,” Adedeji said. “We profiled fundamental methods for plant protein modification, which has made our paper a valuable resource for researchers globally.” 

The research was particularly timely, coinciding with the surge in demand for plant-based proteins driven by sustainability concerns and dietary shifts.  

“When we started this project in 2016, it was the onset of the plant-based protein rush,” Adedeji said. “By the time our paper was published, the food industry was actively seeking alternative protein sources. This alignment significantly contributed to the paper's high citation rate.” 

Adedeji remains optimistic about the future of plant-based proteins, despite acknowledging challenges such as replicating the sensory attributes of animal proteins and addressing the issue of ultra-processed foods.  

“The demand for sustainable protein sources ensures that plant-based proteins will remain integral to the future of food,” he said 

BAE is a partnership between Martin-Gatton CAFE and the  Stanley and Karen Pigman College of Engineering . To learn more, visit  https://www.engr.uky.edu/research-faculty/departments/biosystems-agricultural-engineering .  

This material is based upon work that is supported by the Kentucky Agricultural Experiment Station (KAES), National Institute of Food and Agriculture, U.S. Department of Agriculture, Hatch Multistate Program under award number NC1023. Any opinions, findings, conclusions or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the view of the Department of Agriculture. 

Words: Jordan Strickler (Martin-Gatton College of Agriculture, Food and Environment) Photo: Matt Barton (Martin-Gatton College of Agriculture, Food and Environment)

• Food & Nutrition

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• Jul 26 2024

These are the 10 best-performing stocks of all time

• New research identifies the 10 best-performing US stocks since 1926.
• Of 29,000 US stocks traded since 1926, most had negative returns, but top performers showed consistent gains.
• The study affirms the importance of "time in the market," according to its author, Hendrik Bessembinder.

A new research paper has examined all 29,078 US stocks that have existed since 1926 and identified the top 10 performers of all time.

These stocks, some of them household names, have generated enormous wealth for those who purchased even just one share of the company and held on to it for nearly 100 years.

Of course, identifying the 10 best-performing stocks for the next 100 years is nearly impossible, as the paper's author points out.

"The majority (51.6%) of these stocks had negative cumulative returns," finance professor Hendrik Bessembinder of Arizona State University wrote.

But with a healthy dose of luck, $1 invested in 1926 would have been worth $2.67 million at the end of 2023, assuming it was invested in the right company.

Bessembinder also observed that the 10 best-performing stocks delivered consistently modest annualized gains, reinforcing the slow and steady mantra championed by long-term investors.

"Annualized compound returns to these top performers relatively were modest, averaging 13.47% across the top seventeen stocks, thereby affirming the importance of 'time in the market," Bessembinder wrote.

From soda to cigarettes to computers and airplanes, these are the 10 top-performing US stocks since 1926, according to the paper, which assumed that dividends were reinvested.

Ticker: PEP Return of $1 invested : $86,360 Investment date: December 31, 1925 - December 29, 2023

Ticker: KO Return of $1 invested : $123,724 Investment date: December 31, 1925 - December 29, 2023

• S&P Global

Ticker: SPGI Return of $1 invested : $128,787 Investment date: February 14, 1929 - December 29, 2023

Ticker: ETN Return of $1 invested : $151,173 Investment date: December 31, 1925 - December 29, 2023

• International Business Machines

Ticker: IBM Return of $1 invested : $175,437 Investment date: December 31, 1925- December 29, 2023 5. Boeing

Ticker: BA Return of $1 invested : $212,206 Investment date: September 5, 1934 - December 29, 2023

• General Dynamics

Ticker: GD Return of $1 invested : $220,850 Investment date: January 28, 1926 - December 29, 2023

• Kansas City Southern

Ticker: Delisted after 2021 acquisition by Canadian Pacific Return of $1 invested : $361,757 Investment date: December 31, 1925 - December 13, 2021

• Vulcan Materials

Ticker: VMC Return of $1 invested : $393,492 Investment date: December 31, 1925- December 29, 2023

• Altria Group

Ticker: MO Return of $1 invested : $2,655,290 Investment date: December 31, 1925 - December 29, 2023

• Main content

Hallucinating Law: Legal Mistakes with Large Language Models are Pervasive

A new study finds disturbing and pervasive errors among three popular models on a wide range of legal tasks.

Pitiphothivichit/iStock

In May of last year, a Manhattan lawyer became famous for all the wrong reasons. He submitted a legal brief generated largely by ChatGPT. And the judge did not take kindly to the submission. Describing “an unprecedented circumstance,” the judge noted that the brief was littered with “bogus judicial decisions . . . bogus quotes and bogus internal citations.” The story of the “ChatGPT lawyer” went viral as a  New York Times story, sparking none other than  Chief Justice John Roberts to lament the role of “hallucinations” of large language models (LLMs) in his annual report on the federal judiciary. 

Yet how prevalent are such legal hallucinations, really? 

The Legal Transformation  

The legal industry is on the cusp of a major transformation, driven by the emergence of LLMs like ChatGPT, PaLM, Claude, and Llama. These advanced models, equipped with billions of parameters, have the ability not only to process but also to generate extensive, authoritative text on a wide range of topics. Their influence is becoming more evident across various aspects of daily life, including their growing use in legal practices. 

A dizzying number of legal technology startups and law firms are now advertising and leveraging LLM-based tools for a variety of tasks, such as sifting through discovery documents to find relevant evidence, crafting detailed legal memoranda and case briefs, and formulating complex litigation strategies. LLM developers proudly claim that their models can pass the bar exam. But a core problem remains: hallucinations, or the tendency of LLMs to produce content that deviates from actual legal facts or well-established legal principles and precedents. 

Until now, the evidence was largely anecdotal as to the extent of legal hallucinations. Yet the legal system also provides a unique window to systematically study the extent and nature of such hallucinations. 

In a  new preprint study by Stanford RegLab and Institute for Human-Centered AI researchers, we demonstrate that legal hallucinations are pervasive and disturbing: hallucination rates range from 69% to 88% in response to specific legal queries for state-of-the-art language models. Moreover, these models often lack self-awareness about their errors and tend to reinforce incorrect legal assumptions and beliefs. These findings raise significant concerns about the reliability of LLMs in legal contexts, underscoring the importance of careful, supervised integration of these AI technologies into legal practice.

The Correlates of Hallucination

Hallucination rates are alarmingly high for a wide range of verifiable legal facts. Yet the unique structure of the U.S. legal system – with its clear delineations of hierarchy and authority – allowed us to also understand how hallucination rates vary along key dimensions. We designed our study by constructing a number of different tasks, ranging from asking models simple things like the author of an opinion to more complex requests like whether two cases are in tension with one another, a key element of legal reasoning. We tested more than 200,000 queries against each of GPT 3.5, Llama 2, and PaLM 2, stratifying along key dimensions. 

First, we found that performance deteriorates when dealing with more complex tasks that require a nuanced understanding of legal issues or interpretation of legal texts. For instance, in a task measuring the precedential relationship between two different cases, most LLMs do no better than random guessing. And in answering queries about a court’s core ruling (or holding), models hallucinate at least 75% of the time. These findings suggest that LLMs are not yet able to perform the kind of legal reasoning that attorneys perform when they assess the precedential relationship between cases—a core objective of legal research.

Second, case law from lower courts, like district courts, is subject to more frequent hallucinations than case law from higher courts like the Supreme Court. This suggests that LLMs may struggle with localized legal knowledge that is often crucial in lower court cases, and calls into doubt claims that LLMs will reduce longstanding access to justice barriers in the United States. 

Third, LLMs show a tendency to perform better with more prominent cases, particularly those in the Supreme Court. Similarly, performance is best in the influential Second and Ninth Circuits, but worst in circuit courts located in the geographic center of the country. These performance differences could be due to certain cases being more frequently cited and discussed, thus being better represented in the training data of these models. 

Fourth, hallucinations are most common among the Supreme Court’s oldest and newest cases, and least common among later 20th century cases. This suggests that LLMs’ peak performance may lag several years behind current legal doctrine, and that LLMs may fail to internalize case law that is very old but still applicable and relevant law. 

Last, different models exhibit varying degrees of accuracy and biases. For example, GPT 3.5 generally outperforms others but shows certain inclinations, like favoring well-known justices or specific types of cases. When asked who authored an opinion, for instance, GPT 3.5 tends to think Justice Joseph Story wrote far more opinions than he actually did. 

Contrafactual Bias

Another critical danger that we unearth is model susceptibility to what we call “contra-factual bias,” namely the tendency to assume that a factual premise in a query is true, even if it is flatly wrong. For instance, if one queried, “Why did Justice Ruth Bader Ginsburg dissent in  Obergefell ?” (the case that affirmed a right to same-sex marriage), a model might fail to second-guess whether Justice Ginsburg in fact dissented. 

This phenomenon is particularly pronounced in language models like GPT 3.5, which often provide credible responses to queries based on false premises, likely due to its instruction-following training. This tendency escalates in complex legal scenarios or when dealing with lower court cases. Llama 2, on the other hand, frequently rejects false premises, but sometimes mistakenly denies the existence of actual cases or justices.

Relatedly, we also show that models are imperfectly calibrated for legal questions. Model calibration captures whether model confidence is correlated with the correctness of answers. We find some divergence across models: PaLM 2 and ChatGPT (GPT 3.5) show better calibration than Llama 2. Yet, a common thread across all models is a tendency towards overconfidence, irrespective of their actual accuracy. This overconfidence is particularly evident in complex tasks and those pertaining to lower courts, where models often overstate their certainty, especially in well-known or high-profile legal areas.

Implications for the Law  

The implications of these findings are serious. Today, there is much excitement that LLMs will democratize access to justice by providing an easy and low-cost way for members of the public to obtain legal advice. But our findings suggest that the current limitations of LLMs pose a risk of further  deepening existing legal inequalities, rather than alleviating them.

Ideally, LLMs would excel at providing localized legal information, effectively correct users on misguided queries, and qualify their responses with appropriate levels of confidence. However, we find that these capabilities are conspicuously lacking in current models. Thus, the risks of using LLMs for legal research are especially high for:

• Litigants in lower courts or in less prominent jurisdictions,
• Individuals seeking detailed or complex legal information,
• Users formulating questions based on incorrect premises, and 
• Those uncertain about the reliability of LLM responses.

In essence, the users who would benefit the most from legal LLM are precisely those who the LLMs are least well-equipped to serve.

There is also a looming risk of LLMs contributing to legal “ monoculture .” Because LLMs tend to limit users to a narrow judicial perspective, they potentially overlook broader nuances and diversity of legal interpretations. This is substantively alarming, but there is also a version of representational harm: LLMs may systematically erase the contributions of one member of the legal community, such as Justice Ginsburg, by misattributing them to another, such as Justice Story. 

Moving Forward with Caution

Much active technical work is ongoing to address hallucinations in LLMs. Yet addressing  legal hallucinations is not merely a technical problem. We suggest that LLMs face fundamental trade-offs in balancing fidelity to training data, accuracy in responding to user prompts, and adherence to real-world legal facts. Thus, minimizing hallucinations ultimately requires normative judgments about which type of behavior is most important, and transparency in these balancing decisions is critical.

While LLMs hold significant potential for legal practice, the limitations we document in our work warrant significant caution. Responsible integration of AI in legal practice will require more iteration, supervision, and human understanding of AI capabilities and limitations. 

In that respect, our findings underscore the centrality of human-centered AI. Responsible AI integration must augment lawyers, clients, and judges and not, as Chief Justice Roberts put it, risk “dehumanizing the law.” 

Matthew Dahl is a J.D./Ph.D. student at Yale University and graduate student affiliate of Stanford RegLab. 

Varun Magesh is a research fellow at Stanford RegLab. 

Mirac Suzgun is a J.D/Ph.D. student in computer science at Stanford University and a graduate student fellow at Stanford RegLab. 

Daniel E. Ho is the William Benjamin Scott and Luna M. Scott Professor of Law, Professor of Political Science, Professor of Computer Science (by courtesy), Senior Fellow at HAI, Senior Fellow at SIEPR, and Director of the RegLab at Stanford University. 

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