| Abortion | Attitude Towards Abortion |
| anova | Anova method for fitted IRT models |
| biserial.cor | Point-Biserial Correlation |
| coef | Extract Estimated Loadings |
| cronbach.alpha | Cronbach's alpha |
| descript | Descriptive Statistics |
| Environment | Attitude to the Environment |
| factor.scores | Factor Scores - Ability Estimates |
| fitted | Fitted Values for IRT model |
| gh | Gauss-Hermite Quadrature Points |
| GoF | Goodness of Fit for Rasch Models |
| gpcm | Generalized Partial Credit Model - Polytomous IRT |
| grm | Graded Response Model - Polytomous IRT |
| information | Area under the Test or Item Information Curves |
| item.fit | Item-Fit Statistics and P-values |
| LSAT | The Law School Admission Test (LSAT), Section VI |
| ltm | Latent Trait Model - Latent Variable Model for Binary Data |
| ltm-package | Latent Trait Models for Item Response Theory Analyses |
| margins | Fit of the model on the margins |
| Mobility | Women's Mobility |
| mult.choice | Multiple Choice Items to Binary Responses |
| person.fit | Person-Fit Statistics and P-values |
| plot | Plot method for fitted IRT models |
| plot.descript | Descriptive Statistics Plot method |
| plot.fscores | Factor Scores - Ability Estimates Plot method |
| rasch | Rasch Model |
| rcor.test | Pairwise Associations between Items using a Correlation... |
| residuals | Residuals for IRT models |
| rmvlogis | Generate Random Responses Patterns under Dichotomous and... |
| Science | Attitude to Science and Technology |
| summary | Summary method for fitted IRT models |
| testEquatingData | Prepares Data for Test Equating |
| tpm | Birnbaum's Three Parameter Model |
| unidimTest | Unidimensionality Check using Modified Parallel Analysis |
| vcov | vcov method for fitted IRT models |
| WIRS | Workplace Industrial Relation Survey Data |
