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| Abortion | Attitude Towards Abortion |
| anova.grm | Anova method for fitted IRT models |
| anova.ltm | Anova method for fitted IRT models |
| anova.rasch | Anova method for fitted IRT models |
| coef.grm | Extract Estimated Loadings |
| coef.ltm | Extract Estimated Loadings |
| coef.rasch | Extract Estimated Loadings |
| descript | Descriptive Statistics for Response Matrices |
| Environment | Attitude to the Environment |
| factor.scores | Factor Scores |
| fitted.grm | Fitted Values |
| fitted.ltm | Fitted Values |
| fitted.rasch | Fitted Values |
| grm | Graded Response Model - Polytomous IRT |
| information | Area under the Test Information Function |
| Lsat | The Law School Admission Test (LSAT), Section VI |
| ltm | Latent Trait Model - Latent Variable Model for Binary Data |
| margins | Fit of the model on the margins |
| Mobility | Women's Mobility |
| mult.choice | Multiple Choice Items to Binary Responses |
| plot.grm | Plot method for fitted IRT models |
| plot.ltm | Plot method for fitted IRT models |
| plot.rasch | Plot method for fitted IRT models |
| rasch | Rasch Model |
| rcor.test | Pairwise Associations between Items |
| Science | Attitude to Science and Technology |
| summary.grm | Summary method for fitted IRT models |
| summary.ltm | Summary method for fitted IRT models |
| summary.rasch | Summary method for fitted IRT models |
| vcov.grm | vcov method for fitted IRT models |
| vcov.ltm | vcov method for fitted IRT models |
| vcov.rasch | vcov method for fitted IRT models |
| Wirs | Workplace Industrial Relation Survey Data |