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Note on Two Generalizations of Coefficient Alpha

Published online by Cambridge University Press:  01 January 2025

Nambury S. Raju
Nambury S. Raju*
Affiliation:
Illinois Institute of Technology
*
Requests for reprints should be sent to Nambury S. Raju, Department of Psychology, Illinois Institute of Technology, 3100 S. Dearborn St., Chicago, Illinois 60616.
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Abstract

An important relationship is given for two generalizations of coefficient alpha, Rajaratnam, Cronbach and Gleser's generalizability formula for stratified-parallel tests and Raju's coefficient beta.

Keywords

reliabilitycoefficient alphacoefficient betastratified-parallel tests

Information

Type
Notes And Comments
Information
Psychometrika , Volume 44 , Issue 3 , September 1979 , pp. 347 - 349
Copyright
Copyright © 1979 The Psychometric Society

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Footnotes

The author gratefully acknowledges the generous assistance given by reviewers and the editor.

References

Cronbach, L. J. Coefficient alpha and the internal structure of tests. Psychometrika, 1951, 16, 297–334.CrossRefGoogle Scholar
Rajaratnam, N., Cronbach, L. J., & Gleser, G. C. Generalizability of stratified-parallel tests. Psychometrika, 1965, 30, 39–56.CrossRefGoogle ScholarPubMed
Raju, N. S. A generalization of coefficient alpha. Psychometrika, 1977, 42, 549–565.CrossRefGoogle Scholar