Li Yunyun, Zhang Qin, Liu Fang, Cui Lixia
Learning and Cognition Key Laboratory of Beijing, Department of Psychology, Capital Normal University, Beijing, China.
Neuroreport. 2018 Jan 3;29(1):41-47. doi: 10.1097/WNR.0000000000000925.
The present study used the event-related potentials to investigate the effect of task-irrelevant, high-approach versus low-approach motivational positive affect on proactive and reactive control, and their neural mechanisms. A cue stimulus and a probe stimulus were presented successively in each trial. Participants were required to maintain the information of the cue and respond to the probe. The results showed that high-approach positive affect reduced the amplitudes of P3b after the cue of low frequency and enlarged the amplitudes of contingent negative variation before all the probes. Conversely, low-approach motivational positive affect improved the amplitude of P3a after the probe in some trials. These findings demonstrated that high (compared with the low)-approach motivational positive affect improved proactive control and influenced the early stage of the cognitive control process. Low (relative to high)-approach motivational positive affect facilitated reactive control and influenced the late process stage of cognitive control.
本研究采用事件相关电位来探究与任务无关的、高趋近度与低趋近度的动机性积极情绪对主动控制和反应控制的影响及其神经机制。在每次试验中依次呈现一个线索刺激和一个探测刺激。参与者需要记住线索信息并对探测刺激做出反应。结果表明，高趋近度积极情绪降低了低频线索后的P3b波幅，并增大了所有探测刺激前的关联性负变波幅。相反，低趋近度动机性积极情绪在某些试验中提高了探测刺激后的P3a波幅。这些发现表明，高（与低相比）趋近度动机性积极情绪改善了主动控制，并影响了认知控制过程的早期阶段。低（相对于高）趋近度动机性积极情绪促进了反应控制，并影响了认知控制的后期阶段。
