Self-Generated Identification Codes for Anonymous Collection of Longitudinal Questionnaire Data
- 1 March 1984
- journal article
- Published by Oxford University Press (OUP) in Public Opinion Quarterly
- Vol. 48 (1B) , 370-378
- https://doi.org/10.1093/poq/48.1b.370
Abstract
The success of a self-generated identification code for linking longitudinal questionnaire data was examined. The matching procedure developed for linking questionnaires, including a simple technique to compensate for nonidentical codes, yielded a high success rate (92% linkage of cases over a one-month interval and 78% over a one-year interval) and very few incorrectly linked cases. The procedure worked equally well with elementary and high school students, and the resulting samples were representative of the student population on a wide range of measures. Some suggestions are offered regarding the elements comprising self-generated codes.Keywords
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