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ETS Research Report Series2
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Zwick, Rebecca2
Isham, Steven1
Ye, Lei1
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An Investigation of the Efficacy of Criterion Refinement Procedures in Mantel-Haenszel DIF Analysis. Research Report. ETS RR-13-16
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Zwick, Rebecca; Ye, Lei; Isham, Steven – ETS Research Report Series, 2013
Differential item functioning (DIF) analysis is a key component in the evaluation of the fairness and validity of educational tests. Although it is often assumed that refinement of the matching criterion always provides more accurate DIF results, the actual situation proves to be more complex. To explore the effectiveness of refinement, we…
Descriptors: Test Bias, Statistical Analysis, Simulation, Educational Testing
A Review of ETS Differential Item Functioning Assessment Procedures: Flagging Rules, Minimum Sample Size Requirements, and Criterion Refinement. Research Report. ETS RR-12-08
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Zwick, Rebecca – ETS Research Report Series, 2012
Differential item functioning (DIF) analysis is a key component in the evaluation of the fairness and validity of educational tests. The goal of this project was to review the status of ETS DIF analysis procedures, focusing on three aspects: (a) the nature and stringency of the statistical rules used to flag items, (b) the minimum sample size…
Descriptors: Test Bias, Sample Size, Bayesian Statistics, Evaluation Methods