Evaluation of covariate effects in item response theory models

• Main Authors: Gustaf J. Wellhagen (Author), Ashraf Yassen (Author), Dirk Garmann (Author), Astrid Bröker (Author), Alexander Solms (Author), Yang Zhang (Author), Maria C. Kjellsson (Author), Mats O. Karlsson (Author)
• Format: Book
• Published: Wiley, 2024-05-01T00:00:00Z.
• Subjects: article
• Online Access: Connect to this object online.

Abstract Item response theory (IRT) models are usually the best way to analyze composite or rating scale data. Standard methods to evaluate covariate or treatment effects in IRT models do not allow to identify item‐specific effects. Finding subgroups of patients who respond differently to certain it...