Error awareness as evidence accumulation: effects of speed-accuracy trade-off on error signaling.
Error awareness as evidence accumulation: effects of speed-accuracy trade-off on error signaling.
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DOI：
10.3389/fnhum.2012.00240
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发表时间：
2012
影响因子：
2.9
通讯作者：
Yeung N
中科院分区：
文献类型：
--
作者：
Steinhauser M;Yeung N
选择任务中的错误已经被证明会在人类事件相关电位（ERP）中引发一系列特征成分-错误相关负性（Ne/ERN）和错误正性（Pe）。尽管有大量的研究涉及这些组件，它仍然不清楚它们如何与错误意识的测量公开的错误信号反应。在本研究中，我们认为错误意识作为一个决策过程中，一个错误的证据是积累，直到达到决策标准，并假设Pe是一个相关的积累的决策证据。为了测试Pe的幅度作为错误累积证据的强度和延迟的函数而变化的预测，我们在亮度辨别任务中操纵速度-准确性权衡（SAT），而参与者发出错误发生的信号。根据以前的建模研究，我们预测，较低的速度压力应与较弱的证据错误，因此，与较小的Pe振幅。如所预测的，与高速压力条件相比，在低速压力条件下平均Pe幅度降低，并且错误信号被削弱。在进一步的分析中，我们使用逻辑回归方法推导出单次试验Pe振幅。单次试验的幅度鲁棒地预测信号响应的发生在一个试验的基础上。这些结果证实了证据积累帐户的预测，支持的概念，即Pe反映了积累的证据错误，这一证据驱动错误意识的出现。
Errors in choice tasks have been shown to elicit a cascade of characteristic components in the human event-related potential (ERPs)—the error-related negativity (Ne/ERN) and the error positivity (Pe). Despite the large number of studies concerned with these components, it is still unclear how they relate to error awareness as measured by overt error signaling responses. In the present study, we considered error awareness as a decision process in which evidence for an error is accumulated until a decision criterion is reached, and hypothesized that the Pe is a correlate of the accumulated decision evidence. To test the prediction that the amplitude of the Pe varies as a function of the strength and latency of the accumulated evidence for an error, we manipulated the speed-accuracy trade-off (SAT) in a brightness discrimination task while participants signaled the occurrence of errors. Based on a previous modeling study, we predicted that lower speed pressure should be associated with weaker evidence for an error and, thus, with smaller Pe amplitudes. As predicted, average Pe amplitude was decreased and error signaling was impaired in a low speed pressure condition compared to a high speed pressure condition. In further analyses, we derived single-trial Pe amplitudes using a logistic regression approach. Single-trial amplitudes robustly predicted the occurrence of signaling responses on a trial-by-trial basis. These results confirm the predictions of the evidence accumulation account, supporting the notion that the Pe reflects accumulated evidence for an error and that this evidence drives the emergence of error awareness.
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影响因子：
2.6
作者：
Hughes G;Yeung N
通讯作者：
Yeung N
DOI：
10.1073/pnas.0805903105
发表时间：
2008-11-11
影响因子：
11.1
作者：
Forstmann, Birte U.;Dutilh, Gilles;Wagenmaker, Eric-Jan
通讯作者：
Wagenmaker, Eric-Jan
影响因子：
8.2
作者：
GEHRING, WJ;GOSS, B;DONCHIN, E
通讯作者：
DONCHIN, E
影响因子：
5.7
作者：
Parra, L;Alvino, C;Sajda, P
通讯作者：
Sajda, P
影响因子：
5.7
作者：
Philiastides, Marios G.;Biele, Guido;Heekeren, Hauke R.
通讯作者：
Heekeren, Hauke R.