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Estimation of Latent Ability and Item Parameters when there are Omitted Responses

Published online by Cambridge University Press:  01 January 2025

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

Omitted items cannot properly be treated as wrong when estimating ability and item parameters. A convenient method for utilizing the information provided by omissions is presented. Theoretical and empirical justifications are presented for the estimates obtained by the new method.

Keywords

Public PolicyStatistical TheoryConvenient MethodItem ParameterEmpirical Justification
Type
Original Paper
Information
Psychometrika , Volume 39 , Issue 2 , June 1974 , pp. 247 - 264
Copyright
Copyright © 1974 The Psychometric Society

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Footnotes

*

Research reported in this paper has been supported by grant GB-32781X from National Science Foundation.

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