A Short Note on Obtaining Item Parameter Estimates of IRT Models with Bayesian Estimation in Mplus

Year 2020, Volume: 11 Issue: 3, 266 - 282, 27.09.2020

Sedat Şen Allan Cohen Seock-ho Kım

https://doi.org/10.21031/epod.693719

Cited By: 1

Abstract

Parameter estimation of Item Response Theory (IRT) models can be applied using both Bayesian and non-Bayesian methods. Although maximum likelihood estimation (MLE), a non-Bayesian method, has predominated since the 1970s, there is an increasing use of Bayesian methods, due to their capability for estimating complex models and for their implementation in commercially available software. In view of the recent increase in the popularity of these methods, a comparison between model parameter estimates from the two types of methods would be useful for practitioners. In this study, we compare MLE and Bayesian estimation, two popular methods for obtaining parameter estimates for dichotomous IRT models, using the MLE and Bayes estimator options as implemented in the Mplus software package. Results indicated Bayesian and MLE estimates differed only slightly, clearly demonstrating the consistency between estimates from the two methods. Further, Bayes estimator option in Mplus can be a viable and relatively easy to use tool for calibrations of IRT models.

Keywords

Item response theory, dichotomous models,, Bayesian estimation, Mplus

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