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Detection of Differential Item Functioning in Multiple Groups
Author(s) -
Kim SeockHo,
Cohen Allan S.,
Park TaeHak
Publication year - 1995
Publication title -
journal of educational measurement
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.917
H-Index - 47
eISSN - 1745-3984
pISSN - 0022-0655
DOI - 10.1111/j.1745-3984.1995.tb00466.x
Subject(s) - differential item functioning , item response theory , differential (mechanical device) , psychology , statistics , mathematics , psychometrics , engineering , aerospace engineering
Detection of differential item functioning (DIF) is most often done between two groups of examinees under item response theory. It is sometimes important, however, to determine whether DIF is present in more than two groups. In this article we present a method for detection of DIF in multiple groups. The method is closely related to Lard's chi‐square for comparing vectors of item parameters estimated in two groups. An example using real data is provided.