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The Role of Collateral Information about Examinees in Item Parameter Estimation

Published online by Cambridge University Press:  01 January 2025

Robert J. Mislevy  and
Kathleen M. Sheehan
Robert J. Mislevy*
Affiliation:
Educational Testing Service
Kathleen M. Sheehan
Affiliation:
Educational Testing Service
*
Requests for reprints should be sent to Robert J. Mislevy, Educational Testing Service, Princeton, NJ 08541.
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Abstract

Standard procedures for estimating item parameters in item response theory (IRT) ignore collateral information that may be available about examinees, such as their standing on demographic and educational variables. This paper describes circumstances under which collateral information about examinees may be used to make inferences about item parameters more precise, and circumstances under which it must be used to obtain correct inferences.

Keywords

item response theorymaximum likelihoodmissing datamissing information principle

Information

Type
Original Paper
Information
Psychometrika , Volume 54 , Issue 4 , December 1989 , pp. 661 - 679
Copyright
Copyright © 1989 The Psychometric Society

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Footnotes

This work was supported by Contract No. N00014-85-K-0683, project designation NR 150-539, from the Cognitive Science Program, Cognitive and Neural Sciences Division, Office of Naval Research. Reproduction in whole or in part is permitted for any purpose of the United States Government. We are indebted to Tim Davey, Eugene Johnson, and three anonymous referees for their comments on earlier versions of the paper.

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