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A Note on the Normal Ogive or Logistic Curve in Item Analysis

Published online by Cambridge University Press:  01 January 2025

Frederic M. Lord
Frederic M. Lord*
Affiliation:
Educational Testing Service
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Abstract

It is common to assume that the proportion of correct answers to an item has a normal-ogive or logistic relationship to total test score. However, this is shown to be a mistaken and an undesirable notion.

Type
Original Paper
Information
Psychometrika , Volume 30 , Issue 3 , September 1965 , pp. 371 - 372
Copyright
Copyright © 1965 Psychometric Society

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References

Lord, F. M. The relation of test score to the trait underlying the test. Educ. psychol. Measmt, 1953, 4, 517–549.CrossRefGoogle Scholar