Literature Review

A literature review is a scholarly survey and critical synthesis of existing research on a particular topic. Unlike a simple bibliography or summary of sources, a literature review evaluates, compares, and organizes previous work to establish what is already known, where researchers agree or disagree, and what gaps remain. It situates new research within the broader academic conversation, demonstrating that the author understands the field and has identified a meaningful question that existing studies have not adequately addressed.

The literature review section of a dissertation or journal article typically follows the introduction and precedes the methodology. In the social sciences, a literature review might synthesize decades of studies on a topic like the effect of class size on student performance, identifying trends, contradictions, and methodological limitations. In The Craft of Research by Booth, Colomb, and Williams, the authors emphasize that a literature review is not a parade of summaries but an argument about the state of knowledge. A strong literature review in a field like psychology might reveal that while dozens of studies have examined a phenomenon in laboratory settings, almost none have tested it in real-world conditions, thereby justifying the new study.

To write an effective literature review, begin by searching databases systematically using well-defined keywords and inclusion criteria. Organize sources thematically rather than chronologically, grouping studies by the questions they address rather than listing them in the order you read them. For each source, note not just what it found but how it found it and what it failed to examine. Synthesize rather than summarize: your goal is to tell the story of your field's collective understanding and to show exactly where your own research fits into that story. A literature review that merely catalogs sources is a missed opportunity to build the intellectual foundation of your argument.