Detection of Test Speededness Using Change-Point Analysis
Detection of Test Speededness Using Change-Point Analysis
复制标题
使用变化点分析检测测试速度
作者：
Can Shao;Jun Yu Li;Ying Cheng
变化点分析（CPA）是一种完善的统计方法，用于检测数据序列中的突变（如果有的话）。本文提出了一种基于CPA的测试速度检测方法。该程序不仅可以将考生分为快速组和非快速组，还可以确定考生开始加速的点。确定变更点可能非常有用。首先，它告知决策者测试的适当长度。其次，通过去除快速反应，而不是被怀疑是快速反应的考生的整个反应顺序，可以提高能力估计。仿真研究表明，该方法可以有效地检测超速考生和超速点。通过去除我们的程序确定的快速响应，能力估计得到了显着改善。然后，为了说明目的，将该过程应用于实际数据集。
Change-point analysis (CPA) is a well-established statistical method to detect abrupt changes, if any, in a sequence of data. In this paper, we propose a procedure based on CPA to detect test speededness. This procedure is not only able to classify examinees into speeded and non-speeded groups, but also identify the point at which an examinee starts to speed. Identification of the change point can be very useful. First, it informs decision makers of the appropriate length of a test. Second, by removing the speeded responses, instead of the entire response sequence of an examinee suspected of speededness, ability estimation can be improved. Simulation studies show that this procedure is efficient in detecting both speeded examinees and the speeding point. Ability estimation is dramatically improved by removing speeded responses identified by our procedure. The procedure is then applied to a real dataset for illustration purpose.
影响因子：
2.1
作者：
Li, Jun;Witten, Daniela M.;Tibshirani, Robert
通讯作者：
Tibshirani, Robert
影响因子：
2.7
作者：
Schwartzman, Armin;Lin, Xihong
通讯作者：
Lin, Xihong