Item response theory (IRT) is widely used in education and psychology and is expanding its applications to other social science areas, medical research, and bus

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

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

Introduction to measurement -- The one-parameter model -- Joint maximum likelihood parameter estimation -- Marginal maximum likelihood parameter estimation -- T

This volume provides an introduction to the range of polytomous models available within item response theory. It begins by outlining the distinction between the