What are primary and secondary sources?
Your instructor may specify that you should use primary (and/or secondary) sources in your research. What does this mean?
For the humanities, primary sources are contemporary accounts of an event written by someone who experienced or witnessed it. |
For the physical and social sciences, primary sources may be original research or discoveries. |
Primary source may include:
- Books
- Photographs and images
- Magazine and Newspaper Articles
- Cartoons and Advertisements
- Diaries and Journals
- Movies, Videos, DVDs
- Autobiographies
- Interviews
- Public Opinion Polls
- Letters
- Speeches
- Research Data and Statistics
- Documents produced by organizations
- Documents produces by Government agencies, for example, congressional hearings and census records
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Primary sources may include:
- Reports of scientific discoveries
- Results of experiments
- Results of clinical trials
- Social and political science research results
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Secondary sources interpret, assign value to, conjecture upon, and draw conclusions about the events or results reported in primary sources.
In the humanities, examples of secondary sources include: |
In the physical and social sciences, examples of secondary sources include: |
- Biographies
- Histories written by non-contemporary people
- Literary Criticism
- Book, Art, and Theater Reviews
- Newspaper articles that interpret
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- Publications about the significance of research or experiments
- Analysis of a clinical trial
- Review of the results of several experiments or trials
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