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Download full textSchochet, Peter Z. – National Center for Education Evaluation and Regional Assistance, 2008
Pretest-posttest experimental designs are often used in randomized control trials (RCTs) in the education field to improve the precision of the estimated treatment effects. For logistic reasons, however, pretest data are often collected after random assignment, so that including them in the analysis could bias the posttest impact estimates. Thus,…
Descriptors: Pretests Posttests, Pretesting, Scores, Intervention
