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ERIC Number: EJ797693
Record Type: Journal
Publication Date: 2004-Sep
Pages: 21
Abstractor: As Provided
Reference Count: 32
ISSN: ISSN-1937-6928
An Introduction to Differential Item Functioning Analysis
Kamata, Akihito; Vaughn, Brandon K.
Learning Disabilities: A Contemporary Journal, v2 n2 p49-69 Sep 2004
This article provides a brief primer overview of Differential Item Functioning (DIF) analysis. DIF analysis investigates a differential characteristic of a test item between subpopulations of examinees and is useful in detecting possibly biased items toward a particular subpopulation. As demonstration, a dataset from a 40-item math test in a statewide testing program is analyzed by two widely used approaches, namely, Mantel-Haenszel and logistic regression methods, for the purpose of detecting DIF items against learning disability (LD) students who received testing accommodations. As a result, three items were found to present DIF against LD students who received testing accommodation, while one item was found to present DIF against typical students. Also, a discussion on future directions of DIF analysis study is provided. (Procedure for DIF Analyses on SPSS is appended. Contains 4 tables and 11 figures.)
Learning Disabilities Worldwide, Inc. P.O. Box 142, Weston, MA 02493. Tel: 781-890-5399; Fax: 781-890-0555; Web site:
Publication Type: Journal Articles; Reports - Evaluative
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers - Laws, Policies, & Programs: Individuals with Disabilities Education Act; No Child Left Behind Act 2001