Homogeneity of item responses in the low and high score groups is analyzed by looking at observed and expected item mean scores together with standardized residuals. If the Andersen's CLR test has shown some evidence against homogeneity, this comparison can indicate which items might be responsable.
object of class "Rm", a fitted Rasch model oder partial credit model using the functions RM or PCM in package eRm.
list with observed and expected mean scores together with standardized residuals for the two score groups.
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