PersonMisfit {eRm} R Documentation

## Person Misfit

### Description

This function counts the number of persons who do not fit the Rasch model. More specifically, it returns the proportion and frequency of persons - or more generally cases - who exceed a Chi-square based Z-value of 1.96 (suggesting a statistically significant deviation from the predicted response pattern).

### Usage

## S3 method for class 'ppar'
PersonMisfit(object)


### Arguments

 object Object of class ppar.

### Details

Returns the proportion and absolute number of persons who do not fit the Rasch model (Z-values > 1.96).

### Value

PersonMisfit returns an object of class MisfittingPersons containing:

 PersonMisfit the proportion of misfitting persons, count.misfit.Z the frequency of misfitting person, total.persons the number of persons for whom a fit value was estimated.

### Author(s)

rm1 <- RM(raschdat1)