| mudfold-package | MUDFOLD : A nonparametric unfolding item response theory model for dichotomous preferential-choice data. | 
| ANDRICH | Andrich's attitude scale towards capital punishment | 
| as.mudfold | Function for calculating MUDFOLD statistics for a given unfolding scale. | 
| CAM | Conditional adjacency matrix (CAM) for dichotomously scored items. | 
| coef.mdf | Generic 'coef' method for S3 class '"mdf"' objects. | 
| diagnostics | MUDFOLD scale diagnostics | 
| EURPAR2 | Preferences of European party activists. | 
| ISO | Iso statistic for a given unfolding scale. | 
| Loneliness | De Jong-Gierveld loneliness scale | 
| MAX | Max statistic for a given unfolding scale. | 
| mudfold | MUDFOLD: Van Schuur's nonparametric IRT model for dichotomous responses that have been generated by an unfolding process. | 
| mudfoldsim | Function for constructing artificial item response data generated under an unfolding response process. Unfolding processes model the proximity (distance) between person and item parameters. | 
| pick | Transform items to preference binary data. | 
| Plato7 | Plato's Seven Works | 
| plot.mdf | 'plot' function for '"mdf"' class objects. | 
| print.mdf | 'print' method for '"mdf"' class objects resulted from the 'mudfold' function. | 
| summary.mdf | 'summary' method for S3 class '"mdf"' objects. |