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Robustness of Parameter Estimation to Assumptions of Normality in the Multidimensional Graded Response Model

open access: yesMultivariate Behavioral Research, 2018
A central assumption that is implicit in estimating item parameters in item response theory (IRT) models is the normality of the latent trait distribution, whereas a similar assumption made in categorical confirmatory factor analysis (CCFA) models is the multivariate normality of the latent response variables.
Wang, Chun, Su, Shiyang, Weiss, David J.
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