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Properties of the Item Score Matrix

Published online by Cambridge University Press:  01 January 2025

Angus G. MacLean
Angus G. MacLean*
Affiliation:
California Test Bureau
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Abstract

A method of deriving from the item score matrix all the usual statistics describing the performance on a test of a group of examinees is given. Since this matrix usually is not actually written out, but is implicit in a set of punched cards, a method of working from a more compact matrix F is described. A numerical example is presented. Applications and advantages of the method are cited, as compared with that of recording only the examinees' test scores and the item difficulties.

Type
Original Paper
Information
Psychometrika , Volume 23 , Issue 1 , March 1958 , pp. 47 - 53
Copyright
Copyright © 1958 The Psychometric Society

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References

MacLean, A. G. and Tait, A. T. Some computational short-cuts in the development or analysis of tests. J. appl. Psychol., 1954, 38, 260–263CrossRefGoogle Scholar