Assessing the Sensitivity of Weighted Least Squares Model Fit Indexes to Local Dependence in Item Response Theory Models. Issue 3 (4th May 2017)

• Record Type: Journal Article
• Authors: Huggins-Manley, Anne Corinne; Han, HyunSuk
• Is Part Of: Structural equation modeling. Volume 24:Issue 3(2017)
• Page Start: 331
• Page End: 340
• Publication Date: 2017-05-04
• Subjects: item response theory -- local dependence -- model fit indexes -- WLSMV; Multivariate analysis -- Periodicals; Social sciences -- Statistical methods -- Periodicals; 519.535
• DOI: 10.1080/10705511.2016.1247355
• Languages: English
• ISSNs: 1070-5511

Abstract

Abstract : Given the relationships of item response theory (IRT) models to confirmatory factor analysis (CFA) models, IRT model misspecifications might be detectable through model fit indexes commonly used in categorical CFA. The purpose of this study is to investigate the sensitivity of weighted least squares with adjusted means and variance (WLSMV)-based root mean square error of approximation, comparative fit index, and Tucker–Lewis Index model fit indexes to IRT models that are misspecified due to local dependence (LD). It was found that WLSMV-based fit indexes have some functional relationships to parameter estimate bias in 2-parameter logistic models caused by violations of LD. Continued exploration into these functional relationships and development of LD-detection methods based on such relationships could hold much promise for providing IRT practitioners with global information on violations of local independence.