Robustness of Item Parameter Estimation Programs to Assumptions of Unidimensionality and Normality.

Kirisci, Levent; Hsu, Tse-chi; Yu, Lifa

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Peer reviewed

ERIC Number: EJ633923

Record Type: Journal

Publication Date: 2001

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ISSN: ISSN-0146-6216

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Robustness of Item Parameter Estimation Programs to Assumptions of Unidimensionality and Normality.

Kirisci, Levent; Hsu, Tse-chi; Yu, Lifa

Applied Psychological Measurement, v25 n2 p146-62 Jun 2001

Studied the effects of test dimensionality, theta distribution shape, and estimation program (BILOG, MULTILOG, or XCALIBRE) on the accuracy of item and person parameter estimates through simulation. Derived guidelines for estimating parameters of multidimensional test items using unidimensional item response theory models. (SLD)

Descriptors: Ability, Computer Software, Estimation (Mathematics), Item Response Theory, Robustness (Statistics), Test Items

Publication Type: Journal Articles; Reports - Evaluative

Education Level: N/A

Audience: N/A

Language: English

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