Exploratory and Person/Item Misfit Diagnostics for Polytomous Data
Remove misfitting persons from an epmfd_misfit object
Export epmfd objects to disk
Load and validate raw data for the epmfd workflow
Compute person-fit statistics (polytomous data)
Plot methods for epmfd objects
Plot person misfit in 2D/3D using stored thresholds
Print Method for epmfd_misfit Objects
Scale polytomous item responses
Summary method for epmfd_clean objects
Analysis of items and persons in data. To identify and remove person misfit in polytomous item-response data using either 'mokken' or a graded response model (GRM, via 'mirt'). Provides automatic thresholds, visual diagnostics (2D/3D), and export utilities. Methods build on Mokken scaling as in Mokken (1971, ISBN:9789027968821) and on the graded response model of Samejima (1969) <doi:10.1007/BF03372160>.