The Influence of Dimensionality on CAT Ability Estimation.

De Ayala, R. J.

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Peer reviewed

ERIC Number: EJ453807

Record Type: Journal

Publication Date: 1992

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ISSN: ISSN-0013-1644

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The Influence of Dimensionality on CAT Ability Estimation.

De Ayala, R. J.

Educational and Psychological Measurement, v52 n3 p513-28 Fall 1992

Effects of dimensionality on ability estimation of an adaptive test were examined using generated data in Bayesian computerized adaptive testing (CAT) simulations. Generally, increasing interdimensional difficulty association produced a slight decrease in test length and an increase in accuracy of ability estimation as assessed by root mean square error. (SLD)

Descriptors: Adaptive Testing, Bayesian Statistics, Computer Assisted Testing, Computer Simulation, Difficulty Level, Error of Measurement, Estimation (Mathematics), Graphs, Item Response Theory, Mathematical Models, Test Length

Publication Type: Journal Articles; Reports - Evaluative

Education Level: N/A

Audience: N/A

Language: English

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