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Methodologically Based Discrepancies in Compensatory Education Evaluations.
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Trochim, William M.K. – Evaluation Review, 1982
Meta-analysis of Title I program evaluations shows the norm-referenced model overestimates positive effectiveness; while the regression-discontinuity design underestimates it. Potential biases include residual regression artifacts, attrition and time-of-testing problems in the norm-referenced design, and assignment, measurement, and data…
Descriptors: Compensatory Education, Data Collection, Elementary Secondary Education, Evaluation Methods