Fixed effects IRT model

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

A fixed effect item response theory (IRT) model is developed for modeling group specific item parameters. Two applications are presented. The first application is that the proposed model can be used to detect whether a response mechanism is ignorable using the splitter item technique. The second application is the detection of differential item functioning. In the latter application, the fixed effect item parameters can model item parameter differences between groups. Simulation studies are presented to show the feasibility and performance of the method on both applications.
Original languageUndefined
Pages (from-to)27-42
Number of pages15
JournalBehaviormetrika
Volume33
Issue number1
DOIs
Publication statusPublished - 2006

Keywords

  • METIS-231697
  • Differential item functioning
  • IR-59660
  • MCMC
  • fixed effect
  • Analysis of variance
  • item response theory model

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