Differential item functioning detection using the multiple indicators, multiple causes method with a pure short anchor

Ching Lin SHIH, Wen Chung WANG

Research output: Contribution to journalArticlespeer-review

49 Citations (Scopus)

Abstract

The multiple indicators, multiple causes (MIMIC) method with a pure short anchor was proposed to detect differential item functioning (DIF). A simulation study showed that the MIMIC method with an anchor of 1, 2, 4, or 10 DIF-free items yielded a well-controlled Type I error rate even when such tests contained as many as 40% DIF items. In general, a longer anchor increased the power of DIF detection, and a 4-item anchor was long enough to yield a high power of DIF detection. An iterative MIMIC procedure was proposed to locate a set of DIF-free items to function as a pure anchor so that the MIMIC method could proceed properly. In another simulation study, it was found that this iterative procedure yielded a perfect (or nearly perfect) rate of accuracy in locating a set of up to 4 DIF-free items. Copyright © 2009 Sage Publications.
Original languageEnglish
Pages (from-to)184-199
JournalApplied Psychological Measurement
Volume33
Issue number3
DOIs
Publication statusPublished - May 2009

Citation

Shih, C.-L., & Wang, W.-C. (2009). Differential item functioning detection using the multiple indicators, multiple causes method with a pure short anchor. Applied Psychological Measurement, 33(3), 184-199.

Keywords

  • Differential item functioning
  • MIMIC
  • Matching variable
  • Rasch models
  • Item response theory

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