TIME RESOLUTION OF CLOCKS - EFFECTS ON REACTION-TIME MEASUREMENT - GOOD-NEWS FOR BAD CLOCKS
TIME RESOLUTION OF CLOCKS - EFFECTS ON REACTION-TIME MEASUREMENT - GOOD-NEWS FOR BAD CLOCKS
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DOI：
10.1111/j.2044-8317.1989.tb01111.x
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发表时间：
1989-05-01
影响因子：
2.6
通讯作者：
GIRAY, M
中科院分区：
文献类型：
--
作者：
ULRICH, R;GIRAY, M
本文研究了有限时间分辨钟测量反应时间的方法。提出的问题是：（一）测量和真实RT之间的关系是什么？（B）测量的RT的均值和方差是否有偏差，如果有，（c）这种偏差如何取决于时钟的时间分辨率？(d)Is有可能纠正这种偏见吗？它的结论是，即使时钟的时间分辨率只有30 ms的偏差几乎可以忽略不计。结果表明，有限的时间分辨率的时钟的偏差的平均值和方差的测量RT。此外，它表明，时间分辨率的影响检测一个真正的平均RT差异是可以忽略不计的，如果真RT的方差是比较大的。给出了校正实测RT均值和方差偏差的公式，并分析了时间分辨率对配对观测RT的影响。结果表明，时间分辨率对成对RT测度的乘积矩相关系数有影响，而对协方差无影响。给出了消除积矩相关系数偏差的修正公式。
This paper investigates the measurement of reaction times (RTs) with clocks of limited time resolution. The questions raised are: (a) What is the relationship between measured and true RT?(b)Are mean and variance of measured RT biased, and if so, (c) how does this bias depend on the clock's time resolution?(d)Is it possible to correct this bias? It is concluded that the bias is practically negligible even if the time resolution of a clock is only 30 ms. The results show that a clock of limited time resolution biases mean and variance of measured RT. Furthermore it is shown that the effect of time resolution on detecting a true mean RT difference is negligible if the variance of true RT is relatively large. Formulae are provided to correct the bias of mean and variance of measured RT. In addition the implication of time resolution on measured RT for paired observations is analysed. It is shown that the product moment correlation coefficient but not the covariance of paired RT measures is affected by time resolution. A correction formula to remove the bias on the product moment correlation coefficient is provided.