Analysis of dichotomous and polytomous response data using
unidimensional and multidimensional latent trait models
under the Item Response Theory paradigm. Exploratory and
confirmatory models can be estimated with quadrature (EM)
or stochastic (MHRM) methods. Confirmatory bi-factor and
two-tier analyses are available for modeling item testlets.
Multiple group analysis and mixed effects designs also are
available for detecting differential item functioning and
modeling item and person covariates.Users interested in the most recent version of this package
can visit https://github.com/philchalmers/mirt and
follow the instructions for installing the package from
source. Questions regarding the package can be sent to the
mirt-package Google Group, located at
https://groups.google.com/forum/#!forum/mirt-package.