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

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 clearly describes the most recently developed IRT models and furnishes detailed explanations of algorithms that can be used to estimate the

Several decades of psychometric research have led to the development of sophisticated models for multidimensional test data, and in recent years, multidimension

This graduate-level textbook is a tutorial for item response theory that covers both the basics of item response theory and the use of R for preparing graphical