The book addresses:
IRT models applied to non-educational data especially patient reported outcomes
Differences between cognitive and non-cognitive constructs and the challenges these bring to modeling.
The application of multidimensional IRT models designed to capture typical performance data.
Cutting-edge methods for deriving a single latent dimension from multidimensional data
A new model designed for the measurement of constructs that are defined on one end of a continuum such as substance abuse
Scoring individuals under different multidimensional IRT models and item banking for patient-reported health outcomes
How to evaluate measurement invariance, diagnose problems with response categories, and assess growth and change.
Part 1 reviews fundamental topics such as assumption testing, parameter estimation, and the assessment of model and person fit. New, emerging, and classic IRT models including modeling multidimensional data and the use of new IRT models in typical performance measurement contexts are examined in Part 2. Part 3 reviews the major applications of IRT models such as scoring, item banking for patient-reported health outcomes, evaluating measurement invariance, linking scales to a common metric, and measuring growth and change. The book concludes with a look at future IRT applications in health outcomes measurement. The book summarizes the latest advances and critiques foundational topics such a multidimensionality, assessment of fit, handling non-normality, as well as applied topics such as differential item functioning and multidimensional linking.
Intended for researchers, advanced students, and practitioners in psychology, education, and medicine interested in applying IRT methods, this book also serves as a text in advanced graduate courses on IRT or measurement. Familiarity with factor analysis, latent variables, IRT, and basic measurement theory is assumed.
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