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.