An Introduction to Item Response Theory and Rasch Analysis: Application Using the Eating Assessment Tool (EAT-10). Issue 1 (7th December 2017)

• Record Type: Journal Article
• Authors: Kean, Jacob; Bisson, Erica F.; Brodke, Darrel S.; Biber, Joshua; Gross, Paul H.
• Is Part Of: Brain impairment. Volume 19:Issue 1(2018)
• Page Start: 91
• Page End: 102
• Publication Date: 2017-12-07
• Subjects: Deglutition Disorders, -- Cervical Vertebrae, -- Neurosurgical Procedures, -- Psychometrics; Brain Diseases -- Congresses; Brain Diseases -- Periodicals; Brain -- Diseases -- Periodicals; 616.805
• DOI: 10.1017/BrImp.2017.31
• Languages: English
• ISSNs: 1443-9646

Abstract

Abstract : Item response theory has its origins in educational measurement and is now commonly applied in health-related measurement of latent traits, such as function and symptoms. This application is due, in large part, to gains in the precision of measurement attributable to item response theory and corresponding decreases in response burden, study costs, and study duration. The purpose of this paper is twofold: introduce basic concepts of item response theory and demonstrate this analytic approach in a worked example, a Rasch model (1PL) analysis of the Eating Assessment Tool (EAT-10), a commonly used measure for oropharyngeal dysphagia. The results of the analysis were largely concordant with previous studies of the EAT-10 and illustrate for brain impairment clinicians and researchers how IRT analysis can yield greater precision of measurement.