The theory and practice of item response theory / R.J. de Ayala.

"Simple to more complex models are covered in consistently formatted chapters that build sequentially. The book takes the reader from model development through the fit analysis and interpretation phases that would be performed in practice. To facilitate understanding, common datasets are used across chapters, with the examples worked through for increasingly complex models. Exemplary model applications include free (BIGSTEPS, NOHARM, Facets, R packages) and commercial (BILOG-MG, flexMIRT, SAS, WINMIRA, SPSS, SYSTAT) software packages. The companion website provides data files and online-only appendices. New to This Edition: Chapter on multilevel models. New material on loglinear models, mixed models, the linear logistic trait model, and fit statistics. Many additional worked-through examples. Updated guidance on software; now includes R, SAS, and flexMIRT. Keywords: introduction to IRT, Rasch models, psychometrics, tests and measurement, intermediate, advanced psychometrics texts, modern measurement, latent variable analysis, graduate courses, classes, applied statistics, psychometricians, flexMIRT, testing"-- Provided by publisher.