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ERIC Number: ED454269
Record Type: Non-Journal
Publication Date: 2001-Apr
Pages: 12
Abstractor: N/A
Reference Count: N/A
ISBN: N/A
ISSN: N/A
The Prevalence of Gender DIF in Survey Data.
Dodeen, Hamzeh; Johanson, George
The purpose of this study was to determine the extent and magnitude of differential item functioning (DIF) between males and females in existing attitudinal data sets. The focus was on the approximate proportion of items that show statistically significant DIF in selected data sets concerning attitude scales, the magnitude of this DIF, and whether the items more often favor males or females. Two methods for detecting DIF, the Mantel-Haenszel (MH) procedure and logistic regression (LR), were used. While more than 70 data sets were used, only 23 met the standards for inclusion in this study. These 23 data sets contained 54 acceptable scales with a total of 42,370 subjects responding to 982 items. Results suggest that these scales may have had more than a few items functioning differentially by gender. Generally DIF, with respect to gender, appeared to be reasonably balanced between items favoring males and those favoring females. However, it cannot be concluded that the combined influence of the items (effect size) was impartial. The magnitude of the DIF was not trivial, being in the range of medium to large. Results also show that both methods of DIF detection yielded very similar results with respect to uniform DIF. Conditions favoring one approach over the other are discussed. An appendix contains brief descriptions of the studies considered. (Contains 1 table and 17 references.) (SLD)
Publication Type: Reports - Research; Speeches/Meeting Papers
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A