| 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 |
| LikelihoodInfo2pl | Compute Likelihood Information for the 2PL IRT Model |
| Prob.model | Compute Item Response Probabilities for Various IRT Models |