Primary and secondary sources
The idea
Primary sources provide direct evidence from the time or activity being studied. Secondary sources interpret or synthesize evidence. The distinction depends on your question: a later newspaper article can be a primary source for a study of how events were reported.
Worked example
A historical letter is primary evidence for what its writer said. A modern textbook interpreting several letters is secondary. Neither is automatically free of bias or error.
Another application
A diary written during an event can show the writer’s perspective but omit other experiences. Comparing it with photographs, records, and other accounts can reveal agreements, differences, and gaps.
A common misunderstanding
Primary and secondary describe a source’s relationship to a research question, not a simple ranking of trustworthiness.
Try it yourself
Choose an event and identify one primary and one secondary source. Explain what each could help you learn and what it cannot establish alone.
Check your understanding
Is a primary source automatically more accurate?
Reveal the explained answer
No. Direct evidence still needs evaluation and context.