mirt-package

Full information maximum likelihood estimation of
  multidimensional IRT models

package

Analysis of dichotomous and polychotomous response data
        using latent trait models under the Item Response Theory
        paradigm. Includes the multivariate two- and three-parameter
        logistic models, confirmatory bifactor analysis, polytomous
        exploratory and confirmatory item response models which may
        include polynomial or product constructed factors, and
        partially-compensatory item response modeling in conjunction
        with other IRT models.

mirt-package: Full information maximum likelihood estimation of IRT models.

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