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Peer reviewedMcAlister, Alfred; Gordon, Nancy P. – Evaluation Review, 1986
Self-generated codes to insure student anonymity were used in a study of substance use among 2500 adolescents. Matching rates for various cohorts as a proportion of total respondents at different survey periods were less than ideal. The effects of coding and other attrition factors on the tracking are discussed. (JAZ)
Descriptors: Attrition (Research Studies), Cohort Analysis, Confidentiality, Drug Use
