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Download full textDeke, John; Dragoset, Lisa; Moore, Ravaris – National Center for Education Evaluation and Regional Assistance, 2010
In randomized controlled trials (RCTs) where the outcome is a student-level, study-collected test score, a particularly valuable piece of information is a study-collected baseline score from the same or similar test (a pre-test). Pre-test scores can be used to increase the precision of impact estimates, conduct subgroup analysis, and reduce bias…
Descriptors: Achievement Gains, Scores, Pretests Posttests, Regression (Statistics)
Gale, Irma F.; Boisvert, Louis – 1971
This study of the negative side of children's writing utilized an experimental group and a control group equalized according to sex and the results of the language sub-tests of the Stanford Achievement Tests. Students wrote two 1,000 word composition samples, one during the first month of the study and one during the ninth month. The purposes of…
Descriptors: Child Language, Comparative Analysis, Control Groups, Elementary School Students
