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ERIC Number: EJ455218
Record Type: Journal
Publication Date: 1992
Pages: N/A
Abstractor: N/A
ISBN: N/A
ISSN: ISSN-0022-0655
EISSN: N/A
Available Date: N/A
Resolution of a Regression Paradox in Pretest-Posttest Designs.
Samsa, Gregory P.
Journal of Educational Measurement, v29 n4 p321-28 Win 1992
Regression to the mean (RTM) is often misunderstood. It is demonstrated that artifactual RTM depends fundamentally on the magnitude of measurement error at pretest. Adjustment usually involves estimating the measurement error and determining consequences, but even without adjustment, effects of RTM can be ameliorated. (SLD)
Descriptors: Control Groups, Equations (Mathematics), Error of Measurement, Estimation (Mathematics), Mathematical Models, Paradox, Pretests Posttests, Regression (Statistics), Research Design, Scores
Publication Type: Journal Articles; Reports - Evaluative
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A
Author Affiliations: N/A