DataGeneration          Generating artificial item response data
GHc                     Gauss-Hermite constants
IRTest_Dich             Item and ability parameters estimation for
                        dichotomous items
IRTest_Mix              Item and ability parameters estimation for a
                        mixed-format item response data
IRTest_Poly             Item and ability parameters estimation for
                        polytomous items
dist2                   Re-parameterized two-component normal mixture
                        distribution
original_par_2GM        Recovering original parameters of two-component
                        Gaussian mixture distribution from
                        re-parameterized parameters
plot_LD                 Plotting the estimated latent distribution
