The mupp package contains functions designed to simulation data that represent the GGUM-based MUPP model with corresponding MCMC and EM estimation algorithms. Note that estimation for the MUPP model is assumed to currently be joint estimation of GGUM parameters in a MUPP framework (which could be problematic and lead to some measurement error). Currently, there are no options for fixing initial item parameter estimates or treating items as pretest items, but these functionalities might come in the future.
Within an R session, type the following to install the most current (development) source package from github
devtools::install_github("swnydick/mupp")Take a look at the help pages for simulate_mupp_parameters,
simulate_mupp_responses, estimate_mupp_parameters, and
estimate_mupp_thetas to get started.
The package homepage is currently located here.