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Variational Estimation for Multidimensional Generalized Partial Credit Model

Published online by Cambridge University Press:  01 January 2025

Chengyu Cui
Affiliation:
University of Michigan
Chun Wang*
Affiliation:
University of Washington
Gongjun Xu*
Affiliation:
University of Michigan
*
Correspondence should be made to ChunWang, College of Education, University ofWashington, 312 EMiller Hall, 2012 Skagit Lane, Seattle, WA98105, USA. Email: wang4066@uw.edu
Correspondence should be made to Gongjun Xu, Department of Statistics, University of Michigan, 456 West Hall, 1085 South University, Ann Arbor, MI48109, USA. Email: gongjun@umich.edu

Abstract

Multidimensional item response theory (MIRT) models have generated increasing interest in the psychometrics literature. Efficient approaches for estimating MIRT models with dichotomous responses have been developed, but constructing an equally efficient and robust algorithm for polytomous models has received limited attention. To address this gap, this paper presents a novel Gaussian variational estimation algorithm for the multidimensional generalized partial credit model. The proposed algorithm demonstrates both fast and accurate performance, as illustrated through a series of simulation studies and two real data analyses.

Information

Type
Theory & Methods
Copyright
Copyright © 2024 The Author(s), under exclusive licence to The Psychometric Society

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