Journal article

On the Relationship Between Differential Item Functioning and Item Difficulty: An Issue of Methods? Item Response Theory Approach to Differential Item Functioning

Maria Veronica Santelices, Mark Wilson

Educational and Psychological Measurement | SAGE PUBLICATIONS INC | Published : 2012

Abstract

The relationship between differential item functioning (DIF) and item difficulty on the SAT is such that more difficult items tended to exhibit DIF in favor of the focal group (usually minority groups). These results were reported by Kulick and Hu, and Freedle and have been enthusiastically discussed by more recent literature. Examining the validity of the original reports of this systematic relationship is important so that we can move on to investigating more effectively its causes and the consequences associated to test score use. This article explores the hypothesis that the observed relationship between DIF and item difficulty observed in the SAT could be because of one of the following..

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Funding Acknowledgements

The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This research was funded by UC ACCORD through a dissertation fellowship.