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For some research assignments, it is important to use primary sources, instead of or in addition to secondary sources. What’s the difference?

Primary sources are original documents or objects—first-hand information or the raw material. These original documents are often diaries, letters, memoirs, journals, speeches, or interviews. They may also include published pieces such as newspaper or magazine articles, as long as they are written soon after the fact and not as historical accounts. Eye witness accounts, photographs, audio or video recordings, research reports in the natural or social sciences, or original literary or theatrical works are also considered primary sources.

Secondary sources interpret primary sources. Secondary sources include comments on, interpretations of, or discussions about the original material. You can think of secondary sources as second-hand information. 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.

Examples of Primary and Secondary Sources

For more in-depth information and video instruction including Popular vs. Scholarly: College Research - The Basics: Learn About Scholarly Publications