IMT                     Runs information matrix test for an information
                        matrix test GPCM model.
collapse_data           Collapses data for a given collapsing function
dataset                 Synthetic dataset of 1000 responses to 10
                        items, each with four categories, generated
                        from a Partial Credit Model.
gh                      Table with GH points
gpcm_IMT                Runs the GPCM model for use in the Information
                        Matrix Test.
