Differential Item Functioning for Accommodated Students with Disabilities: Effect of Differences in Proficiency Distributions

Autor/inn/en	Quesen, Sarah; Lane, Suzanne
Titel	Differential Item Functioning for Accommodated Students with Disabilities: Effect of Differences in Proficiency Distributions
Quelle	In: Applied Measurement in Education, 32 (2019) 4, S.337-349 (13 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0895-7347
DOI	10.1080/08957347.2019.1660347
Schlagwörter	Test Items; Mathematics Tests; Grade 8; Item Response Theory; Hierarchical Linear Modeling; Regression (Statistics); Students with Disabilities; Testing Accommodations; Ability; Differences; Statistical Analysis; Scores; Multiple Choice Tests + Suchen Sie Ihr Suchwort? Test content; Testaufgabe; School year 08; 8. Schuljahr; Schuljahr 08; Item-Response-Theorie; Regression; Regressionsanalyse; Student; Students; Disability; Disabilities; Schüler; Schülerin; Studentin; Behinderung; Testing process; Accessibility (for disabled); Accessibility; Disabled person; Testdurchführung; Testen; Barrierefreiheit; Zugänglichkeit; Behinderter; Fähigkeit; Fertigkeit; Unterscheiden; Statistische Analyse; Multiple choice examinations; Multiple-choice tests, Multiple-choice examinations; Multiple-Choice-Verfahren
Abstract	This study examined the effect of similar vs. dissimilar proficiency distributions on uniform DIF detection on a statewide eighth grade mathematics assessment. Results from the similar- and dissimilar-ability reference groups with an SWD focal group were compared for four models: logistic regression, hierarchical generalized linear model (HGLM), the Wald-1 IRT-based test, and the Mantel-Haenszel procedure. A DIF-free-then-DIF strategy was used. The rate of DIF detection was examined among all accommodated scores and common accommodation subcategories. No items were detected for DIF using the similar ability distribution reference group, regardless of method. With the dissimilar ability reference group, logistic regression and Mantel-Haenszel flagged 8-17%, and the Wald-1 and HGLM test flagged 23-38% of items for DIF. Forming focal groups by accommodation type did not alter the pattern of DIF detection. Creating a reference group to be similar in ability to the focal group may control the rate of erroneous DIF detection for SWD. (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2020/1/01