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Peer reviewed Peer reviewed
ERIC Number: EJ282220
Record Type: CIJE
Publication Date: 1983
Pages: N/A
Abstractor: N/A
Reference Count: 0
ISBN: N/A
ISSN: N/A
A Re-Analysis of "Lord's Paradox."
Locascia, Joseph J.; Cordray, David S.
Educational and Psychological Measurement, v43 n1 p115-26 Spr 1983
This paper demonstrates that gain score analysis and analysis of covariance (ANCOVA) will always yield conflicting results unless the slopes of within-group regression lines of posttest on pretest equal one. In Lord's specific hypothetical example, trait instability invalidates the ANCOVA. An analysis that corrects for this problem is demonstrated. (Author/BW)
Descriptors: Achievement Gains, Analysis of Covariance, Data Analysis, Higher Education, Hypothesis Testing, Regression (Statistics), Statistical Bias
Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers: Gain Scores; Lord (Frederic M); Lords Paradox