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. User contributed files,
workshop files, and evaluated help files are also available on the package wiki
(https://github.com/philchalmers/mirt/wiki).