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ERIC Number: EJ633927
Record Type: Journal
Publication Date: 2001
Pages: N/A
Abstractor: N/A
Reference Count: N/A
ISSN: ISSN-0193-841X
Statistical Power for Nonequivalent Pretest-Posttest Designs: The Impact of Change-Score versus ANCOVA Models.
Oakes, J. Michael; Feldman, Henry A.
Evaluation Review, v25 n1 p3-28 Feb 2001
Describes and compares useful and unified power formulas for analysis of covariance and change-score analyses, indicating the implications of each for sample size requirements. Contains practical recommendations for evaluations and outlines a simple spreadsheet approach. (SLD)
Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
IES Cited: ED503448