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A Nested Logit Approach for Investigating Distractors as Causes of Differential Item Functioning
Author(s) -
Suh Youngsuk,
Bolt Daniel M.
Publication year - 2011
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.1745-3984.2011.00139.x
Subject(s) - differential item functioning , logit , psychology , differential (mechanical device) , item response theory , nested logit , logistic regression , cognitive psychology , test (biology) , psychometrics , econometrics , developmental psychology , computer science , machine learning , mathematics , paleontology , engineering , biology , aerospace engineering
In multiple‐choice items, differential item functioning (DIF) in the correct response may or may not be caused by differentially functioning distractors. Identifying distractors as causes of DIF can provide valuable information for potential item revision or the design of new test items. In this paper, we examine a two‐step approach based on application of a nested logit model for this purpose. The approach separates testing of differential distractor functioning (DDF) from DIF, thus allowing for clearer evaluations of where distractors may be responsible for DIF. The approach is contrasted against competing methods and evaluated in simulation and real data analyses.