hIRT: Hierarchical Item Response Theory Models

Implementation of a class of hierarchical item response theory (IRT) models where both the mean and the variance of latent preferences (ability parameters) may depend on observed covariates. The current implementation includes both the two-parameter latent trait model for binary data and the graded response model for ordinal data. Both are fitted via the Expectation-Maximization (EM) algorithm. Asymptotic standard errors are derived from the observed information matrix.

Getting started

Package details

AuthorXiang Zhou [aut, cre]
MaintainerXiang Zhou <xiang_zhou@fas.harvard.edu>
LicenseGPL (>= 3)
URL http://github.com/xiangzhou09/hIRT
Package repositoryView on CRAN
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hIRT documentation built on April 14, 2020, 7:07 p.m.