International Psychoanalytic University Berlin, Germany.
International Psychoanalytic University Berlin, Germany.
Int J Psychophysiol. 2017 Jul;117:26-36. doi: 10.1016/j.ijpsycho.2017.04.005. Epub 2017 Apr 11.
Response appropriateness is not exclusively limited to accuracy. Nevertheless, the processing of parameters other than accuracy for response monitoring has been mostly neglected. The present experiment explored how the cognitive system processes response speed based on internal and external signals. Participants performed a response-choice task where correct responses were classified as fast, average, or slow. External signals informative about performance quality were presented after the response in most of the trials; in some trials, instead, participants had to judge their own performance. Event-related brain potentials (ERPs) of response and feedback processing were analysed to investigate how the cognitive system monitors correct responses. Response quality affected the processing of internal signals. That is, both the response-related negativity (correct-related negativity, CRN) and positivity (correct positivity, Pc) showed modulations related to speed: with the largest and the smallest amplitudes associated with fast and slow responses, respectively. We ascribe these modulations to positive arousal associated with the optimal nature of correct fast responses. Response quality, also affected feedback processing. Here, response speed significantly modulated the feedback-related negativity (FRN) and had an effect on the latency and the magnitude of the preceding positive peak. These effects in feedback processing seem related to feedback expectation in a context where awareness of feedback quality is vague and average performance, although more difficult to detected, is generally expected.
反应适宜性不仅限于准确性。然而，对于反应监测的除准确性以外的参数的处理在很大程度上被忽视了。本实验探索了认知系统如何基于内部和外部信号来处理反应速度。参与者执行了一项反应选择任务，其中正确的反应被分为快速、平均和缓慢。在大多数试验中，在反应之后会呈现关于表现质量的外部信号；而在一些试验中，参与者必须判断自己的表现。分析了反应和反馈处理的事件相关脑电位（ERPs），以研究认知系统如何监测正确的反应。反应质量影响内部信号的处理。也就是说，反应相关负波（正确相关负波，CRN）和正波（正确正波，Pc）都表现出与速度有关的调制：与快速和缓慢反应相关的最大和最小振幅。我们将这些调制归因于与正确快速反应的最佳性质相关的积极唤醒。反应质量也影响了反馈处理。在这里，反应速度显著调制了反馈相关负波（FRN），并影响了之前正峰的潜伏期和幅度。这些反馈处理中的效应似乎与反馈期望有关，在这种情况下，反馈质量的意识是模糊的，尽管更难检测到，但通常预期平均表现。
