Disciplinary Applications of Secondary Sources

Secondary Sources in Science, Technology, and Medicine Understanding Secondary Sources Across Disciplines A secondary source is a work that interprets, synthesizes, or summarizes information from other sources—typically primary sources. However, secondary sources vary significantly depending on the academic discipline. Understanding these variations is essential for conducting research, evaluating sources, and writing academic work. In Science, Technology, and Medicine In scientific fields, secondary sources are commonly called "secondary literature" and typically appear as review articles or meta-analyses. These sources serve a crucial function: they summarize existing research findings and synthesize what researchers have discovered about particular topics. Common forms of secondary sources in science include: Literature review sections in research papers. When a paper's introduction surveys and discusses previous work on a topic, that section functions as a secondary source. Reference book chapters that explain what is currently known about a disease, treatment, or scientific concept. Synthesis articles written specifically to review and consolidate available literature on a subject. The goal of secondary scientific sources is to provide researchers and readers with a comprehensive overview of the current state of knowledge without having to read every individual primary research paper. Important Distinction: When One Source Can Be Both Primary and Secondary One concept that often confuses students is that a source's classification—primary or secondary—depends on how you use it, not just what it is. Consider a book review as an example: A reviewer writes a critical evaluation of a newly published book. This review is: A primary source for the reviewer's opinions and judgments about the book A secondary source for the book's actual contents and arguments This distinction matters because if you're researching what the original book claims, you should consult the book itself (primary), not rely on the reviewer's interpretation. However, if you're studying critical reception or academic opinions about the book, the review becomes your primary source. In Mathematics Mathematics takes a slightly different approach to secondary sources. In mathematical fields, secondary sources exist primarily to make complex ideas, theorems, and proofs from primary sources more accessible to a broader audience. A difficult proof published in a specialized journal might be explained in clearer, more approachable language in a secondary mathematical source to help students and researchers understand it better. In History and the Humanities In historical and humanities scholarship, secondary sources are typically books or articles written by scholars who interpret and analyze primary source material. This differs from sciences, where secondary sources often provide data summaries. How secondary sources function in history: Historians classify their sources to ensure research independence and credibility. A historian must understand which sources are original documents (primary) and which are later scholarly interpretations (secondary). Traditionally, following the 19th-century German Rankean model of historical research, historians build their arguments on archives of primary sources—original documents from the period being studied—which they then interpret through the lens of existing scholarly work. Most undergraduate research projects in history and humanities rely heavily on secondary source material, typically incorporating only selected excerpts from primary sources to support their arguments. This is appropriate because secondary sources provide the scholarly context and interpretation framework needed to understand primary materials. In Law Law has a particularly strict distinction between primary and secondary sources because legal authority and precedent matter fundamentally. Primary legal sources include: Court cases and judicial decisions Constitutions Statutes and legislative acts Administrative regulations Other binding legal authorities Secondary legal sources include: Books and treatises about law Headnotes (summaries) of case reports Scholarly legal articles Legal encyclopedias The key difference in legal writing: legal writers strongly prefer citing primary sources because they carry authoritative precedential power—they can establish binding obligations. Secondary legal sources are merely persuasive—they can influence legal arguments but hold no binding authority. When a lawyer or legal scholar writes, they build arguments on the foundation of primary legal sources and support them with secondary sources for context and interpretation. Special Case: Autobiographies and Memoirs An autobiography or memoir presents an interesting edge case. These are generally primary sources when used as evidence about the author's own life, experiences, or thoughts. However, an autobiography becomes a secondary source when you use it to gain information about topics other than the author's own life. For example, if you're reading Benjamin Franklin's autobiography to learn about his personal beliefs and experiences, it's a primary source. But if you're using it to learn about 18th-century colonial society or the printing industry, it becomes a secondary source—Franklin is interpreting and reporting on something external to his own experience, just as any other secondary source author would. Key Takeaway The classification of a source as primary or secondary is not absolute—it depends on: Your research question (what you're trying to learn) The academic discipline (different fields use sources differently) How you're using the source (as direct evidence or as interpretation) Understanding these nuances helps you select appropriate sources, evaluate their reliability, and build credible arguments in your academic work.