What is a codebook?
A. A codebook is the text document that accompanies a dataset and explains the coding system — that is, the way in which information was assigned digital equivalents in order to be readable by statistical software programs. Codebooks explain each variable in the dataset. If the original instrument is a public opinion survey, the codebook will often provide the exact wording of each question (sometimes even a facsimile version of the questionnaire), indicate the names of each variable, the column or relative position of variables within the dataset, and indicate the numeric coding for each type of response: for example, 01 for strongly agree, 02 for slightly agree, 03 for slightly disagree, etc. The codebook also provides information on the original data collection project — the purpose of the original researchers, an explanation of methodology, notes on sample size, field dates, information on how to cite the study, and more. For further information, see ICPSR’s explanation of codebo
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