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.

中文翻译：

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预期情绪刺激时时间感知机制的脑电图研究

当前研究的主要目标是确定当预期具有相同唤醒水平的正面、中性或负面刺激时，与时间感知有关的机制的电生理特征。参与者被要求将时间间隔的持续时间与 2 秒的参考间隔进行比较。标记给定比较区间的圆圈颜色表示即将呈现的刺激的效价，每个刺激都来自国际情感图片系统 (IAPS)。行为数据表明，对具有不同价态的刺激的期望会引起时间扭曲，而对负面刺激的期望会导致对时间的高估。电生理数据，更具体地说是 N150、N200、LPP 和 CNV 组件，