Evaluating the Magnitude of Differential Item Functioning in Polytomous Items.

Zwick, Rebecca; Thayer, Dorothy T.

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Peer reviewed

ERIC Number: EJ535142

Record Type: Journal

Publication Date: 1996

Pages: N/A

Abstractor: N/A

ISBN: N/A

ISSN: ISSN-1076-9986

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Evaluating the Magnitude of Differential Item Functioning in Polytomous Items.

Zwick, Rebecca; Thayer, Dorothy T.

Journal of Educational and Behavioral Statistics, v21 n3 p187-201 Fall 1996

Two possible standard error formulas for the polytomous differential item functioning index proposed by N. J. Dorans and A. P. Schmitt (1991) were derived. These standard errors, and associated hypothesis-testing procedures, were evaluated through simulated data. The standard error that performed better is based on N. Mantel's (1963) hypergeometric model. (SLD)

Descriptors: Error of Measurement, Evaluation Methods, Hypothesis Testing, Item Bias, Simulation, Test Items

Publication Type: Reports - Evaluative; Speeches/Meeting Papers; Journal Articles

Education Level: N/A

Audience: N/A

Language: English

Sponsor: N/A

Authoring Institution: N/A

Grant or Contract Numbers: N/A

Author Affiliations: N/A