Benefiting from item preknowledge is a major type of fraudulent behavior during educational assessments. This article suggests a new statistic that can be used for detecting the examinees who may have benefited from item preknowledge using their response times. The statistic quantifies the difference in speed between the compromised items and the non-compromised items of the examinees. The distribution of the statistic under the null hypothesis of no preknowledge is proved to be the standard normal distribution. A simulation study is used to evaluate the Type I error rate and power of the suggested statistic. A real data example demonstrates the usefulness of the new statistic that is found to provide information that is not provided by statistics based only on item scores.

中文翻译：

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使用响应时间检测项目知识。

从项目知识中受益是教育评估过程中欺诈行为的主要类型。本文提出了一种新的统计数据，该统计数据可用于使用其响应时间来检测可能受益于项目知识的考生。该统计数据量化了考生的妥协项目和非妥协项目之间的速度差异。在没有先验知识的原假设下的统计量分布被证明是标准正态分布。仿真研究用于评估I类错误率和建议统计量的功效。一个真实的数据示例演示了新统计信息的实用性，发现该新统计信息可提供仅基于项目得分的统计信息无法提供的信息。