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1 results

Bayesian Estimation of Item Response Curves
Robert K. Tsutakawa, Hsin Ying Lin
Journal:

Psychometrika / Volume 51 / Issue 2 / June 1986

Published online by Cambridge University Press:

01 January 2025, pp. 251-267
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Item response curves for a set of binary responses are studied from a Bayesian viewpoint of estimating the item parameters. For the two-parameter logistic model with normally distributed ability, restricted bivariate beta priors are used to illustrate the computation of the posterior mode via the EM algorithm. The procedure is illustrated by data from a mathematics test.

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