LikelihoodInfo2pl       Compute Likelihood Information for the 2PL IRT
                        Model
Prob.model              Compute Item Response Probabilities for Various
                        IRT Models
dat01                   Dichotomous Response Dataset for IRT
                        Calibration
irt2pl                  Estimation of the 2PL Model via Marginal
                        Bayesian Modal Estimation
irtbem2pl               Calibrate 2PL Model via Marginal Bayesian Modal
                        Estimation
irtchek2pl              Checking user speciflied input variables
