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ERIC Number: EJ850931
Record Type: Journal
Publication Date: 2009
Pages: 24
Abstractor: As Provided
Reference Count: 42
ISBN: N/A
ISSN: ISSN-0146-6216
The Impact of Multidimensionality on the Detection of Differential Bundle Functioning Using Simultaneous Item Bias Test
Furlow, Carolyn F.; Ross, Terris Raiford; Gagne, Phill
Applied Psychological Measurement, v33 n6 p441-464 2009
Douglas, Roussos, and Stout introduced the concept of differential bundle functioning (DBF) for identifying the underlying causes of differential item functioning (DIF). In this study, reference group was simulated to have higher mean ability than the focal group on a nuisance dimension, resulting in DIF for each of the multidimensional items that, when examined together, produced DBF. The empirical power and the Type I error of the Simultaneous Item Bias Test for DBF analysis were examined under various sample sizes, ratios of reference to focal group sizes, correlations between target and nuisance dimensions, magnitudes of DIF/ DBF, test lengths, percentages of test items in the bundle, and item discriminations. Power was generally high in cells with larger DIF magnitudes, higher percentages of items in the bundle, larger sample sizes, and with the nuisance dimension having a higher discrimination than the target dimension. Type I error rates approximated the nominal alpha rate for all conditions. (Contains 7 tables.)
SAGE Publications. 2455 Teller Road, Thousand Oaks, CA 91320. Tel: 800-818-7243; Tel: 805-499-9774; Fax: 800-583-2665; e-mail: journals@sagepub.com; Web site: http://sagepub.com
Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A