Gibbs_2PNO              Gibbs Implementation of 2PNO
Gibbs_4PNO              Gibbs Implementation of 4PNO
Total_Tabulate          Calculate Tabulated Total Scores
Y_4pno_simulate         Simulate from 4PNO Model
min2LL_4pno             Compute 4PNO Deviance
rmvnorm                 Generate Random Multivariate Normal
                        Distribution
