
doi: 10.1007/bf02294798
A normally distributed person-fit index is proposed for detecting aberrant response patterns in latent class models and mixture distribution IRT models for dichotomous and polytomous data.This article extends previous work on the null distribution of person-fit indices for the dichotomous Rasch model to a number of models for categorical data. A comparison of two different approaches to handle the skewness of the person-fit index distribution is included.
appropriateness measurement, mixed Rasch model, polytomous Rasch model, latent class analysis, Applications of statistics to psychology, person-fit
appropriateness measurement, mixed Rasch model, polytomous Rasch model, latent class analysis, Applications of statistics to psychology, person-fit
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