A Comparison of Tests for Equality of Two or More Independent Alpha Coefficients

Autor/inn/en	Kim, Seonghoon; Feldt, Leonard S.
Titel	A Comparison of Tests for Equality of Two or More Independent Alpha Coefficients
Quelle	In: Journal of Educational Measurement, 45 (2008) 2, S.179-193 (15 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0022-0655
DOI	10.1111/j.1745-3984.2008.00059.x
Schlagwörter	Tests; Comparative Analysis; Hypothesis Testing; Error of Measurement; Computer Simulation; Computation + Suchen Sie Ihr Suchwort? Examination; Prüfung; Examen; Hypothesenprüfung; Hypothesentest; Messfehler; Computergrafik; Computersimulation
Abstract	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.) (Author).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10