Investigating the Impact of Uncertainty About Item Parameters on Ability Estimation
Investigating the Impact of Uncertainty About Item Parameters on Ability Estimation
复制标题
研究项目参数的不确定性对能力估计的影响
DOI:
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发表时间:
2011
期刊:
影响因子:
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通讯作者:
T. Lu
中科院分区:
文献类型:
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作者:
Jinming Zhang;Min‐ge Xie;Xiaolan Song;T. Lu
Asymptotic expansions of the maximum likelihood estimator (MLE) and weighted likelihood estimator (WLE) of an examinee’s ability are derived while item parameter estimators are treated as covariates measured with error. The asymptotic formulae present the amount of bias of the ability estimators due to the uncertainty of item parameter estimators. A numerical example is presented to illustrate how to apply the formulae to evaluate the impact of uncertainty about item parameters on ability estimation and the appropriateness of estimating ability using the regular MLE or WLE method.