Peer reviewedERIC Number: EJ258806
Record Type: Journal
Publication Date: 1981-Sep
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Abstractor: N/A
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A Priori Tests in Repeated Measures Designs: Effects of Nonsphericity.
Boik, Robert J.
Psychometrika, v46 n3 p241-55 Sep 1981
The validity conditions for univariate repeated measures designs are described. Attention is focused on the sphericity (equality of variance) requirement. It is recommended that separate rather than pooled error term procedures be routinely used to test a priori hypotheses. (Author/JKS)
Descriptors: Analysis of Variance, Hypothesis Testing, Mathematical Models, Research Design, Validity
Publication Type: Journal Articles; Reports - Evaluative; Reports - Research
Education Level: N/A
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Language: English
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