This comprehensive Handbook focuses on the most used polytomous item response theory (IRT) models. These models help us understand the interaction between exami

Item response theory has become an essential component in the toolkit of every researcher in the behavioral sciences. It provides a powerful means to study indi

Item response theory (IRT) has moved beyond the confines of educational measurement into assessment domains such as personality, psychopathology, and patient-re

A must-have resource for researchers, practitioners, and advanced students interested or involved in psychometric testing Over the past hundred years, psychomet