What defines a primary source in research?

A primary source in research is defined as an original source of information. This type of source provides direct, firsthand evidence or data that has not been altered or interpreted by others. Examples of primary sources include original research articles, diaries, interviews, photographs, and historical documents. These sources offer direct insights into the subject being studied, which is essential for researchers seeking to gather unmediated evidence.

The other types of sources listed do not qualify as primary. For instance, summaries or commentaries provide interpretations or discussions of primary works, while secondary interpretations analyze or critique the information in primary literature. Derivative works further rely on primary sources but do not present new information themselves. Thus, the nature of a primary source is its originality and direct connection to the research topic, which makes it indispensable for accurate analysis and conclusions in any research endeavor.