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ERIC Number: EJ794582
Record Type: Journal
Publication Date: 2008
Pages: 15
Abstractor: Author
Reference Count: 27
ISSN: ISSN-0022-0655
A Comparison of Tests for Equality of Two or More Independent Alpha Coefficients
Kim, Seonghoon; Feldt, Leonard S.
Journal of Educational Measurement, v45 n2 p179-193 Sum 2008
This article extends the Bonett (2003a) approach to testing the equality of alpha coefficients from two independent samples to the case of m [greater than or equal] 2 independent samples. The extended Fisher-Bonett test and its competitor, the Hakstian-Whalen (1976) test, are illustrated with numerical examples of both hypothesis testing and power calculation. Computer simulations are used to compare the performance of the two tests and the Feldt (1969) test (for m=2) in terms of power and Type I error control. It is shown that the Fisher-Bonett test is just as effective as its competitors in controlling Type I error, is comparable to them in power, and is equally robust against heterogeneity of error variance. (Contains 1 figure and 5 tables.)
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Publication Type: Journal Articles; Reports - Evaluative
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A