Reducing Bias in CAT Trait Estimation: A Comparison of Approaches.

Wang, Tianyou; Hanson, Bradley A.; Lau, Che-Ming A.

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Peer reviewed

ERIC Number: EJ596310

Record Type: Journal

Publication Date: 1999

Pages: N/A

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ISBN: N/A

ISSN: ISSN-0146-6216

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Reducing Bias in CAT Trait Estimation: A Comparison of Approaches.

Wang, Tianyou; Hanson, Bradley A.; Lau, Che-Ming A.

Applied Psychological Measurement, v23 n3 p263-78 Sep 1999

Extended the use of a beta prior in trait estimation to the maximum expected a posteriori (MAP) method of Bayesian estimation. This new method, essentially unbiased MAP, was compared with MAP, essentially unbiased expected a posteriori, weighted likelihood, and maximum-likelihood estimation methods. The new method significantly reduced bias in fixed-length tests. (SLD)

Descriptors: Adaptive Testing, Bayesian Statistics, Computer Assisted Testing, Estimation (Mathematics), Maximum Likelihood Statistics, Test Bias, Test Length

Publication Type: Journal Articles; Reports - Evaluative

Education Level: N/A

Audience: N/A

Language: English

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Author Affiliations: N/A