Codebook (Research)

A codebook is a structured set of codes, definitions, and application rules used to systematically analyse qualitative data (interview transcripts, observation notes, documents) or to extract data from literature for review work. It typically specifies each code's name, definition, inclusion and exclusion criteria, and example quotations, enabling multiple researchers to code consistently and making the analysis reproducible. In accessibility research, codebooks are central to reflexive thematic analysis and to scoping and systematic reviews where codebook transparency is a marker of methodological quality.