Differential item functioning / Steven J. Osterlind, Howard T. Everson.
Material type: TextSeries: Quantitative applications in the social sciences ; no. 07-161.Publication details: Thousand Oaks, Calif : SAGE, c2009. Edition: 2nd edDescription: x, 87 p. : ill. ; 22 cmISBN: 9781412954945 (pbk. : acidfree paper); 1412954940 (pbk. : acidfree paper)Subject(s): Social sciences -- Statistical methods | Social sciences -- MethodologyDDC classification: 519.5/2 LOC classification: HA29 | .O79 2009Other classification: 77.07Current library | Call number | Copy number | Status | Notes | Date due | Barcode |
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The Iddi Basajjabalaba Memorial Library Postgraduate Library | HA29 .O79 2009 (Browse shelf(Opens below)) | 001 | Available | Material is available in hard copy | 2016-115033047 | |
The Iddi Basajjabalaba Memorial Library Reserved Books Section | HA29 .O79 2009 (Browse shelf(Opens below)) | 002 | Available | Material is available in hard copy | 2017-165641090 |
Revised ed. of: Test item bias.
Includes bibliographical references and indexes.
Introduction: Audience and requisite background. Role of DIF investigation. Fairness and DIF. Bias and DIF. DIF and discrimination. Understanding the term DIF. Working vocabulary for this monograph. -- Description of DIF: Formal definition of DIF. DIF: Uniform or not -- Statistical facets of DIF: Not mean (average) difference. Error in measurement. Differences are systematic. Matching on ability or proficiency. Conditioning criterion: internal versus external. Purification of data -- Important considerations: DIF: statistics versus reasoned judgment. statistical bias is not unfairness. Whole test versus individual items. Number: items and sample. A sensible perspective -- History of test bias and DIF: Standards for test fairness -- Quick-but-incomplete methods: Ordinal ranking of items. Ability group methods. Outdated ANOVA methods -- Mantel-Haenszel procedure: CHi-Square contingency table. M-H odds ratio -- Nonparametric methods: DIF with SIBTEST. Dorans's standardization -- IRT-based methods: IRT framework. Item response curves. The one-parameter model. The two-parameter model. The three-parameter model. DIF methods based on IRT. Differences in item parameters. Likelihood ratio test. Area measures. IRT approaches for detecting DIF in polytomous items -- Logistic regression: The logistic regression DIF expression. Example of DIF by logistic regression -- Specialized scored items. Computer-based testing. Computer-adaptive testing. Translated tests -- Future Directions: Validity argument. Null hypothesis testing. Statistical modeling (HLM and Other). Equivalence testing. DFIT and CDIF testing.
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