The Effect of the Uncertainty of Item Parameter Estimation on Ability Estimates.

Tsutakawa, Robert K.; Johnson, Jane C.

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Peer reviewed

ERIC Number: EJ414322

Record Type: Journal

Publication Date: 1990

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ISSN: ISSN-0033-3123

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The Effect of the Uncertainty of Item Parameter Estimation on Ability Estimates.

Tsutakawa, Robert K.; Johnson, Jane C.

Psychometrika, v55 n2 p371-90 Jun 1990

The conventional method of measuring ability--based on items with assumed true parameter values obtained from a pretest--is compared to a Bayesian method that deals with the uncertainties of such items. Data from a 1987 American College Testing Program mathematics test indicate that maximum likelihood/Bayesian techniques underestimate uncertainty. (TJH)

Descriptors: Ability Identification, Bayesian Statistics, College Entrance Examinations, Comparative Analysis, Equations (Mathematics), Higher Education, Item Response Theory, Mathematical Models, Mathematics Tests, Maximum Likelihood Statistics, Standardized Tests, Test Interpretation

Publication Type: Journal Articles; Reports - Evaluative

Education Level: N/A

Audience: N/A

Language: English

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