Ability Estimation Under Different Item Parameterization and Scoring Models
Description:
A Monte Carlo simulation study investigated the effect of scoring format, item parameterization, threshold configuration, and prior ability distribution on the accuracy of ability estimation given various IRT models. Item response data on 30 items from 1,000 examinees was simulated using known item parameters and ability estimates. The item response data sets were submitted to seven dichotomous or polytomous IRT models with different item parameterization to estimate examinee ability. The accur…
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Date:
May 2002
Creator:
Si, Ching-Fung B.
Partner:
UNT Libraries