| DataGeneration | Generating artificial item response data |
| dist2 | Re-parameterized two-component normal mixture distribution |
| 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 |
| original_par_2GM | Recovering original parameters of two-component Gaussian mixture distribution from re-parameterized parameters |
| plot_LD | Plotting the estimated latent distribution |