S-Space Language Education Institute (언어교육원) Language Research (어학연구) Language Research (어학연구) Volume 41 Number 1/4 (2005)
Differential Item Functioning: Current Issues
- Park, Gi-Pyo
- Issue Date
- 서울대학교 언어교육원
- 어학연구, Vol.41 No.4, pp. 949-962
- This study describes current issues of differential item functioning (DIF) used by psychometricians and test specialists to identify item fairness across members of different subgroups such as males and females. First, the definition of DIF was discussed, centering on Simpson's paradox and two different types of DIF: uniform DIF and non-uniform DIF. Then, three commonly used DIF detection techniques - the MantelHaenszel method, confirmatory factor analysis (CFA), and the likelihood
ratio (LR) test - were introduced. Third, the relation of DIF to differential test functioning (DTF) was explored with the generation of three research hypotheses based on current empirical studies. Finally, this study was concluded with future research inquiries to be answered.