This Article Full Text (PDF) References Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Citing Articles via Scopus Google Scholar Articles by Bonett, D. G. Search for Related Content Social Bookmarking                         What's this?

Sample Size Requirements for Testing and Estimating Coefficient Alpha

Iowa State University

An approximate test and confidence interval for coefficient alpha are derived. The approximate test and confidence interval are then used to derive closed-form sample size formulas. The sample size formulas can be used to determine the sample size needed to test coefficient alpha with desired power or to estimate coefficient alpha with desired precision. The sample size formulas closely approximate the sample size requirements for an exact confidence interval or an exact test.

Key Words: hypothesis testing • internal consistency • interval estimation • sample size determination • test reliability

Journal of Educational and Behavioral Statistics, Vol. 27, No. 4, 335-340 (2002)
DOI: 10.3102/10769986027004335


CiteULike    Complore    Connotea    Del.icio.us    Digg    Reddit    Technorati    Twitter    What's this?

This article has been cited by other articles:

				J. L. Romano and J. D. Kromrey What Are the Consequences If the Assumption of Independent Observations Is Violated in Reliability Generalization Meta-Analysis Studies? Educational and Psychological Measurement, June 1, 2009; 69(3): 404 - 428. [Abstract] [PDF]