What are secondary sources in research?

Secondary sources in research refer to documents and materials that interpret, analyze, or summarize primary research findings. These sources do not present new experimental work or original data; rather, they compile and synthesize information from various primary sources. For example, literature reviews, meta-analyses, and articles that discuss findings from multiple studies all fall into this category.

By summarizing or critiquing the original research, secondary sources provide context and broader understanding, making them valuable for researchers who are investigating a particular topic without the need to delve into each primary study individually. This approach helps in identifying trends, gaps, and broader implications of the research field.

The other options describe different types of research sources. Original studies conducted by the researcher are primary sources, as they present new data or findings. Data collected directly from the source is also primary, as it involves firsthand information. Detailed case studies that follow a specific methodology typically represent primary research, as they document unique instances studied in depth.