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ERIC Number: EJ879623
Record Type: Journal
Publication Date: 2009
Pages: 22
Abstractor: As Provided
Reference Count: 31
ISSN: ISSN-1076-9986
Modification of the Mantel-Haenszel and Logistic Regression DIF Procedures to Incorporate the SIBTEST Regression Correction
DeMars, Christine E.
Journal of Educational and Behavioral Statistics, v34 n2 p149-170 2009
The Mantel-Haenszel (MH) and logistic regression (LR) differential item functioning (DIF) procedures have inflated Type I error rates when there are large mean group differences, short tests, and large sample sizes.When there are large group differences in mean score, groups matched on the observed number-correct score differ on true score, contributing to inflated Type I error rates. The simultaneous item bias test procedure has incorporated an adjustment for this difference, originally using a linear regression correction and later using a nonlinear correction. In this study, these adjustments are applied to the MH and LR procedures. They effectively reduce the Type I error inflation for the MH and the LR test of uniform DIF, but not the LR test of nonuniform DIF. For large samples and large group mean differences, the [delta] effect size is estimated with greater accuracy using these adjustments. (Contains 3 tables and 5 figures.)
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A