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Bayesian Estimation of Item Response Curves

Published online by Cambridge University Press:  01 January 2025

Robert K. Tsutakawa*
Affiliation:
University of Missouri-Columbia
Hsin Ying Lin
Affiliation:
University of Missouri-Columbia
*
Requests for reprints should be sent to Robert K. Tsutakawa, Department of Statistics, University of Missouri, Columbia, MO 65211.

Abstract

Item response curves for a set of binary responses are studied from a Bayesian viewpoint of estimating the item parameters. For the two-parameter logistic model with normally distributed ability, restricted bivariate beta priors are used to illustrate the computation of the posterior mode via the EM algorithm. The procedure is illustrated by data from a mathematics test.

Information

Type
Original Paper
Copyright
Copyright © 1986 The Psychometric Society

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