SOME CONSEQUENCES OF THE UNCERTAINTY IN IRT LINKING PROCEDURES
SOME CONSEQUENCES OF THE UNCERTAINTY IN IRT LINKING PROCEDURES
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IRT 链接程序的不确定性的一些后果
DOI：
10.1002/j.2330-8516.1988.tb00294.x
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发表时间：
1988
影响因子：
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通讯作者：
R. Mislevy
中科院分区：
文献类型：
--
作者：
K. Sheehan;R. Mislevy
在项目反应理论的许多实际应用中，需要从不同的被试样本中估计重叠子集的参数。一个链接程序，然后将产生的项目参数估计到一个共同的规模。在进行涉及不同子集的项目的推断时，忽略与链接步骤相关的不确定性是标准做法，例如，在测量变化时会出现这种情况。本文概述了如何可以占的不确定性，并阐明了与刀切近似的Stocking-Lord链接程序的想法。国家教育进步评估的例子表明，由此产生的不确定性通常可以忽略不计的个人的推论，但可以构成一个主要来源的估计误差，如群体平均值的变化。
In many practical applications of item response theory, the parameters of overlapping subsets of test items are estimated from different samples of examinees. A linking procedure is then employed to place the resulting item parameter estimates onto a common scale. It is standard practice to ignore the uncertainty associated with the linking step when drawing inferences that involve items from different subsets, a situation that arises, for example, in the measurement of change. This paper outlines how the uncertainty can be accounted for, and exemplifies the ideas with a jackknife approximation for the Stocking-Lord linking procedure. Examples from the National Assessment of Educational Progress suggest that the resulting uncertainty will usually be negligible for inferences about individuals, but can constitute a major source of estimation error in aggregate statistics such as changes in group means.