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Attrition: Identification and Exploration in the National Follow Through Evaluation.

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St. Pierre, Robert G.; Proper, Elizabeth C. – 1976

A general interest in attrition, or loss of units from a study, stems in part from the observation that the infrequency of attention to attrition exacerbates problems of data interpretation. As a substudy of the national evaluation of Project Follow Through, the potential biasing effects of attrition of subjects from the sites were investigated.…

Descriptors: Analysis of Covariance, Attrition (Research Studies), Compensatory Education, Data Collection