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Sample Size Requirements for Testing and Estimating Coefficient Alpha

Author

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  • Douglas G. Bonett

Abstract

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.

Suggested Citation

  • Douglas G. Bonett, 2002. "Sample Size Requirements for Testing and Estimating Coefficient Alpha," Journal of Educational and Behavioral Statistics, , vol. 27(4), pages 335-340, December.
    • Handle: RePEc:sae:jedbes:v:27:y:2002:i:4:p:335-340
    DOI: 10.3102/10769986027004335
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    1. repec:cup:judgdm:v:15:y:2020:i:1:p:112-134 is not listed on IDEAS
    2. Yiyun Shou & Joel Olney, 2020. "Assessing a domain-specific risk-taking construct: A meta-analysis of reliability of the DOSPERT scale," Judgment and Decision Making, Society for Judgment and Decision Making, vol. 15(1), pages 112-134, January.

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