Comparing the Reliability of Difference Scores and Residuals in Analysis of Covariance.

Malgady, Robert G.; Colon-Malgady, Gerardita

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Peer reviewed

ERIC Number: EJ440441

Record Type: Journal

Publication Date: 1991

Pages: N/A

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ISSN: ISSN-0013-1644

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Comparing the Reliability of Difference Scores and Residuals in Analysis of Covariance.

Malgady, Robert G.; Colon-Malgady, Gerardita

Educational and Psychological Measurement, v51 n4 p803-07 Win 1991

The reliability of residual scores created in the analysis of covariance in pretest-posttest designs, adjusted for a singe covariate, is compared with that of simple difference scores as relevant parameters vary. Little gain in reliability is created by analysis of covariance, which also suffers from reliability problems. (SLD)

Descriptors: Analysis of Covariance, Comparative Analysis, Correlation, Equations (Mathematics), Estimation (Mathematics), Mathematical Models, Pretests Posttests, Psychological Testing, Reliability, Scores

Publication Type: Journal Articles; Reports - Evaluative

Education Level: N/A

Audience: N/A

Language: English

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Authoring Institution: N/A

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Author Affiliations: N/A