Focus on Psychometrics. Coefficient alpha: Conceptualizations and anomalies
- 1 January 1991
- journal article
- research article
- Published by Wiley in Research in Nursing & Health
- Vol. 14 (6) , 457-460
- https://doi.org/10.1002/nur.4770140610
Abstract
In this article distinctions are made among some of the different conceptualizations of, and formulas for, Cronbach's coefficient alpha as it is applied to dichotomous or nondi-chotomous, standardized or unstandardized, and weighted or unweighted data. Issues regarding the statistical significance of alpha and the occasionally encountered anomalies of artificially high alpha and negative values of alpha are given particular attention.Keywords
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