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ERIC Number: ED441007
Record Type: Non-Journal
Publication Date: 2000-Apr-27
Pages: 44
Abstractor: N/A
Reference Count: N/A
An Investigation of the Likelihood Ratio Test, the Mantel Test, and the Generalized Mantel-Haenszel Test of DIF.
Kim, Seock-Ho
This paper is concerned with statistical issues in differential item functioning (DIF). Four subsets of large scale performance assessment data from the Georgia Kindergarten Assessment Program-Revised (N=105,731; N=10,000; N=1,00; and N=100) were analyzed using three DIF detection methods for polytomous items to examine the congruence among the DIF detection methods. The DIF detection methods were the likelihood ratio test, the Mantel test, and the generalized Mantel-Haenszel test. Results indicated some agreement among the DIF detection methods within each sample and across the samples except for N=100. Because statistical power is a function of the sample size, however, the DIF detection results from extremely large samples are not useful. As alternatives to the DIF detection methods, four model-based indices of standardized impact and four observed-score indices of standardized impact for polytomous items were obtained and compared for N=105,731. (Contains 3 figures, 10 tables, and 55 references.) (Author/SLD)
Publication Type: Numerical/Quantitative Data; Reports - Evaluative; Speeches/Meeting Papers
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A