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A Note on Reliability

Published online by Cambridge University Press:  01 January 2025

Hyman B. Kaitz
Hyman B. Kaitz*
Affiliation:
Social Security Board (on military leave.)
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Abstract

A formula for internal consistency reliability is developed within the framework of the analysis of variance. The test items are assumed to be homogeneous, but may have any weights. Data needed for computation are the student test scores, and the total number of items answered so as to have the same weight. It is shown that this formula reduces to the Kuder-Richardson (21) for item weights of one and zero. Some empirical validation is offered.

Type
Original Paper
Information
Psychometrika , Volume 10 , Issue 2 , June 1945 , pp. 127 - 131
Copyright
Copyright © 1945 The Psychometric Society

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Footnotes

*

Kuder. G. F. and Richardson, M. W. The theory of the estimation of test reliability. Psychometrika, 1937, 2, 151-160.

References

† Hoyt, C. J. Test reliability estimated by the analysis of variance. Psychometrika, 1941, 6, 153-160.

‡ Dressel, P. L. Some remarks on the Kuder-Richardson reliability coefficient. Psychometrika, 1940, 5, 305-310.

§ Op. cit.

* Rundquist and Sletto, Personality in the depression. Minneapolis: Univ. Minn. Press, 1936.