The Effect of Item Parameter Drift on Examinee Ability Estimates.

Wells, Craig S.; Subkoviak, Michael J.; Serlin, Ronald C.

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Peer reviewed

ERIC Number: EJ649901

Record Type: Journal

Publication Date: 2002

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ISSN: ISSN-0146-6216

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The Effect of Item Parameter Drift on Examinee Ability Estimates.

Wells, Craig S.; Subkoviak, Michael J.; Serlin, Ronald C.

Applied Psychological Measurement, v26 n1 p77-87 Mar 2002

Investigated the effect of item parameter drift on ability estimates under item response theory, simulating item response data for two testing occasions for the two-parameter logistic model under several crossed conditions. Results show that item parameter drift under the simulated conditions had a small effect on ability estimates. (SLD)

Descriptors: Ability, Estimation (Mathematics), Item Response Theory, Simulation

Publication Type: Journal Articles; Reports - Research

Education Level: N/A

Audience: N/A

Language: English

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