ERIC Number: EJ1048934
Record Type: Journal
Publication Date: 2015
Abstractor: As Provided
Reference Count: 36
An Empirical Comparison of DDF Detection Methods for Understanding the Causes of DIF in Multiple-Choice Items
Suh, Youngsuk; Talley, Anna E.
Applied Measurement in Education, v28 n1 p48-67 2015
This study compared and illustrated four differential distractor functioning (DDF) detection methods for analyzing multiple-choice items. The log-linear approach, two item response theory-model-based approaches with likelihood ratio tests, and the odds ratio approach were compared to examine the congruence among the four DDF detection methods. Data from a college-level mathematics placement test were analyzed to understand the causes of differential functioning. Results indicated some agreement among the four detection methods. To facilitate practical interpretation of the DDF results, several possible effect size measures were also obtained and compared.
Descriptors: Test Bias, Multiple Choice Tests, Test Items, Methods, Comparative Analysis, Item Response Theory, Mathematics Tests, College Mathematics, Effect Size
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Publication Type: Journal Articles; Reports - Research
Education Level: Higher Education; Postsecondary Education
Authoring Institution: N/A