Scoring and Estimating Score Precision Using Multidimensional IRT Models

Authored by: Anna Brown , Tim J. Croudace

Handbook of Item Response Theory Modeling

Print publication date:  December  2014
Online publication date:  November  2014

Print ISBN: 9781848729728
eBook ISBN: 9781315736013
Adobe ISBN: 9781317565703


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The ultimate goal of measurement is to produce a score by which individuals can be assessed and differentiated. Item response theory (IRT) modeling views responses to test items as indicators of a respondent’s standing on some underlying psychological attributes (van der Linden & Hambleton, 1997)—we often call them latent traits—and devises special algorithms for estimating this standing. This chapter gives an overview of methods for estimating person attribute scores using one-dimensional and multidimensional IRT models, focusing on those that are particularly useful with patient-reported outcome (PRO) measures.

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