NotesFAQContact Us
Search Tips
Peer reviewed Peer reviewed
Direct linkDirect link
ERIC Number: EJ1015150
Record Type: Journal
Publication Date: 2013-Aug
Pages: 18
Abstractor: As Provided
ISSN: ISSN-0013-1644
The Influence of Between-Dimension Correlation, Misfit, and Test Length on Multidimensional Rasch Model Information-Based Fit Index Accuracy
Harrell-Williams, Leigh M.; Wolfe, Edward W.
Educational and Psychological Measurement, v73 n4 p672-689 Aug 2013
Most research on confirmatory factor analysis using information-based fit indices (Akaike information criterion [AIC], Bayesian information criteria [BIC], bias-corrected AIC [AICc], and consistent AIC [CAIC]) has used a structural equation modeling framework. Minimal research has been done concerning application of these indices to item response models, especially within the framework of multidimensional Rasch analysis with an emphasis of the role of between-dimension correlation on index accuracy. We investigated how sample size, between-dimension correlation, model-to-data misfit, and test length affect the accuracy of these indices in model recovery in dichotomous data using a multidimensional Rasch analysis simulation methodology. Results reveal that, at higher values of between-dimension correlation, AIC indicated the correct two-dimension generating structure slightly more often than the BIC or CAIC. The results also demonstrated that violations of the Rasch model assumptions are magnified at higher between-dimension correlations. We recommend that practitioners working with highly correlated multidimensional data use moderate length (roughly 40 items) instruments and minimize data-to-model misfit in the choice of model used for confirmatory factor analysis (multidimensional random coefficient multinomial logit or other multidimensional item response theory models). (Contains 4 tables and 2 figures.)
SAGE Publications. 2455 Teller Road, Thousand Oaks, CA 91320. Tel: 800-818-7243; Tel: 805-499-9774; Fax: 800-583-2665; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A