Université Laval, Québec, Canada.
Université Laval, Québec, Canada.
Biol Psychol. 2019 Nov;148:107777. doi: 10.1016/j.biopsycho.2019.107777. Epub 2019 Sep 25.
The main goal of the current study was to identify the electrophysiological signatures of the mechanisms involved in the perception of time when expecting positive, neutral or negative stimuli that have equal arousal levels. Participants were asked to compare the duration of time intervals with a 2-sec reference interval. The color of circles marking a given comparison interval signaled the valence of the upcoming stimulus to be presented, each stimulus being drawn from the International Affective Picture System (IAPS). The behavioral data suggest that time distortion can be induced by the expectation of stimuli with different valences and that expecting a negative stimulus leads to an overestimation of time. The electrophysiological data, more specifically the N150, N200, LPP and CNV components, provide evidence of the implication of attentional mechanisms and possibly strategic adjustments of cognitive control for time perception.
本研究的主要目的是识别在预期具有同等唤醒水平的正性、中性或负性刺激时，参与感知时间的机制的电生理特征。要求参与者将时间间隔与 2 秒的参考间隔进行比较。标记给定比较间隔的圆圈的颜色表示即将呈现的刺激的效价，每个刺激均取自国际情感图片系统 (IAPS)。行为数据表明，对不同效价的刺激的预期可以引起时间扭曲，并且预期负性刺激会导致时间高估。电生理数据，特别是 N150、N200、LPP 和 CNV 成分，为注意力机制的参与以及可能对时间感知的认知控制的策略性调整提供了证据。
