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The Relationship between Differential Distractor Functioning (DDF) and Differential Item Functioning (DIF): If DDF Occurs, Must DIF Occur?
Deng, Jiayi
Deng, Jiayi
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Abstract
Differential Distractor Functioning (DDF) and Differential Item Functioning (DIF) are two critical ways for detecting potential test fairness issues. The current study aims to illustrate the relationship between the existence of DDF and that of DIF by using multiple-choice items in PIRL 2016 achievement test. Multinomial logistic regression and binary logistic regression were used for DDF and DIF detection, respectively. Correlation test and binomial test were used to explore the relationship between DDF and DIF. The results showed no relationship between DDF and DIF was detected. In addition, there was no evidence for the association between DIF and DDF detection and the test content.
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Date
2020-05-31
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University of Kansas
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Keywords
Educational psychology, Differential Distractor Functioning (DDF), Differential Item Functioning (DIF)