Estimating Reliability for Tests With One Constructed-Response Item in a Section

Q3 Social Sciences
Yanxuan Qu, Sandip Sinharay
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引用次数: 0

Abstract

The goal of this paper is to find better ways to estimate the internal consistency reliability of scores on tests with a specific type of design that are often encountered in practice: tests with constructed-response items clustered into sections that are not parallel or tau-equivalent, and one of the sections has only one item. To estimate the reliability of scores on this kind of test, we propose a two-step approach (denoted as CA_STR) that first estimates the reliability of scores on the section with a single item using the correction for attenuation method and then estimates the reliability of scores on the whole test using the stratified coefficient alpha. We compared the CA_STR method with three other reliability estimation approaches under various conditions using both real and simulated data. We found that overall, the CA_STR method performed the best and it was easy to implement.

Abstract Image

估计在一个部分中只有一个构造反应项目的测试的信度
本文的目的是找到更好的方法来估计具有特定设计类型的测验分数的内部一致性信度,这种类型的测验在实践中经常遇到:测验中的建构-反应项目被集中到不平行或不等距的部分,其中一个部分只有一个项目。为了估计这类测验分数的信度,我们提出了一种两步法(记为 CA_STR),即首先用衰减校正法估计单个项目部分分数的信度,然后用分层系数α估计整个测验分数的信度。我们利用真实数据和模拟数据,比较了 CA_STR 方法和其他三种信度估计方法在不同条件下的效果。我们发现,总体而言,CA_STR 方法的性能最好,而且易于实施。
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来源期刊
ETS Research Report Series
ETS Research Report Series Social Sciences-Education
CiteScore
1.20
自引率
0.00%
发文量
17
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