BEMM.1PLAG              Calibrating 1PLAG model via Bayesian
                        Expectation-Maximization-Maximization (BEMM)
                        algorithm.
BEMM.1PLG               Calibrating 1PLG model via Bayesian
                        Expectation-Maximization-Maximization (BEMM)
                        algorithm.
BEMM.3PL                Calibrating 3PL model via Bayesian
                        Expectation-Maximization-Maximization (BEMM)
                        algorithm.
BEMM.4PL                Calibrating 4PL model via Bayesian
                        Expectation-Maximization-Maximization (BEMM)
                        algorithm.
Input.Checking          Checking user speciflied input variables.
Prob.model              Calculate the probabilites based on a given
                        model and parameters.
