A Conditional Item-Fit Index for Rasch Models.

Rost, Jurgen; von Davier, Matthias

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Peer reviewed

ERIC Number: EJ502411

Record Type: Journal

Publication Date: 1994

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ISSN: ISSN-0146-6216

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A Conditional Item-Fit Index for Rasch Models.

Rost, Jurgen; von Davier, Matthias

Applied Psychological Measurement, v18 n2 p171-82 Jun 1994

A new item-fit index is proposed that is both a descriptive measure of deviance of single items and an index for statistical inference. This index is based on assumptions of the dichotomous and polytomous Rasch models for items with ordered categories. A simulation study is described. (SLD)

Descriptors: Equations (Mathematics), Goodness of Fit, Item Response Theory, Simulation, Statistical Inference, Test Construction, Test Items

Publication Type: Reports - Evaluative; Journal Articles

Education Level: N/A

Audience: N/A

Language: English

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