Generalizability theory and item response theory

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Item response theory is usually applied to items with a selected-response format, such as multiple choice items, whereas generalizability theory is usually applied to constructed-response tasks assessed by raters. However, in many situations, raters may use rating scales consisting of items with a selected-response format. This chapter presents a short overview of how item response theory and generalizability theory were integrated to model such assessments. Further, the precision of the estimates of the variance components of a generalizability theory model in combination with two- and three-parameter models is assessed in a small simulation study
Original languageEnglish
Title of host publicationPsychometrics in Practice at RCEC
EditorsT.J.H.M. Eggen, B.P. Veldkamp
ISBN (Print)9789036533744
Publication statusPublished - 2012


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