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Item Selection Methods for Increasing Test Homogeneity

Published online by Cambridge University Press:  01 January 2025

Harold Webster
Harold Webster*
Affiliation:
Vassar College
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Abstract

A number of methods for increasing test homogeneity by item selection are discussed. Exact selection conditions which will maximize obtained homogeneity as measured by KR - 20 and KR - 21 are derived, and an application is given. Since they require only item count data, the selection conditions are economical to apply.

Information

Type
Original Paper
Information
Psychometrika , Volume 22 , Issue 4 , December 1957 , pp. 395 - 404
Copyright
Copyright © 1957 The Psychometric Society

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