| 甄别答案抄袭的K指数方法 |
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| 引用本文： | 陆敏.甄别答案抄袭的K指数方法[J].考试研究,2009(1):57-69. |
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| 作者姓名： | 陆敏 |
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| 作者单位： | 北京语言大学; |
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| 摘 要： | 目前，除考场监考等考务手段外，考试安全机构还通过对考生作答的异常一致性进行试后甄别，从而判定考生是否抄袭。判定考生抄袭有多种统计方法，K指数是美国ETS在多项选择题考试中使用的判定方法之一。本文介绍了K指数的原理、方法，对使用K指数的结果进行了讨论，并认为K指数保守地估计了对考生由于偶然因素导致作答一致的概率。
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| 关 键 词： | K指数 抄袭 错同 一致性概率 |
K-Index for Detecting Answer Copying |
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| Lu Min Beijing Language , Culture University,Beijing.K-Index for Detecting Answer Copying[J].Examinations Research,2009(1):57-69. |
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| Authors: | Lu Min Beijing Language Culture University Beijing |
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| Institution: | Lu Min Beijing Language , Culture University,Beijing,100083 |
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| Abstract: | Besides test invigilation,test security office recently also pays attention on detecting unusual agreement between two examinees to detect answer copying after the test.Among many statistical methods,K-index is used in multiple choices test by ETS to detect answer copying.This paper introduces the theory and approach of K-index,discusses its results,and considers that K-index is a conservative approximation to the agreement probability. |
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| Keywords: | K-Index Copying Matching Incorrect Response Agreement probability |
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