ERIC Number: EJ1086561
Record Type: Journal
Publication Date: 2016-Feb
Abstractor: As Provided
The Mediated MIMIC Model for Understanding the Underlying Mechanism of DIF
Cheng, Ying; Shao, Can; Lathrop, Quinn N.
Educational and Psychological Measurement, v76 n1 p43-63 Feb 2016
Due to its flexibility, the multiple-indicator, multiple-causes (MIMIC) model has become an increasingly popular method for the detection of differential item functioning (DIF). In this article, we propose the mediated MIMIC model method to uncover the underlying mechanism of DIF. This method extends the usual MIMIC model by including one variable or multiple variables that may completely or partially mediate the DIF effect. If complete mediation effect is found, the DIF effect is fully accounted for. Through our simulation study, we find that the mediated MIMIC model is very successful in detecting the mediation effect that completely or partially accounts for DIF, while keeping the Type I error rate well controlled for both balanced and unbalanced sample sizes between focal and reference groups. Because it is successful in detecting such mediation effects, the mediated MIMIC model may help explain DIF and give guidance in the revision of a DIF item.
Descriptors: Test Bias, Models, Simulation, Sample Size, International Assessment, Foreign Countries, Likert Scales, Scientific Attitudes, Grade 8
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Publication Type: Journal Articles; Reports - Research
Education Level: Grade 8; Junior High Schools; Middle Schools; Elementary Education; Secondary Education
Sponsor: National Science Foundation (NSF)
Authoring Institution: N/A
Identifiers - Assessments and Surveys: Trends in International Mathematics and Science Study
Grant or Contract Numbers: NSF1350787