Electrophysiological signatures of temporal context in the bisection task

被引:4
|
作者
Baykan, Cemre [1 ]
Zhu, Xiuna [1 ]
Zinchenko, Artyom [1 ]
Mueller, Hermann J. [1 ]
Shi, Zhuanghua [1 ]
机构
[1] Ludwig Maximilians Univ Munchen, Dept Psychol, Gen & Expt Psychol, Leopoldstr 13, D-80802 Munich, Germany
关键词
Time perception; EEG; Temporal bisection; CNV; P2; LPCt; CONTINGENT NEGATIVE-VARIATION; EVIDENCE ACCUMULATION; DECISION-MAKING; VARIATION CNV; DURATION; TIME; JUDGMENTS; DISCRIMINATION; STATISTICS; MEMORY;
D O I
10.1007/s00221-023-06670-1
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Despite having relatively accurate timing, subjective time can be influenced by various contexts, such as stimulus spacing and sample frequency. Several electroencephalographic (EEG) components have been associated with timing, including the contingent negative variation (CNV), offset P2, and late positive component of timing (LPCt). However, the specific role of these components in the contextual modulation of perceived time remains unclear. In this study, we conducted two temporal bisection experiments to investigate this issue. Participants had to judge whether a test duration was close to a short or long standard. Unbeknownst to them, we manipulated the stimulus spacing (Experiment 1) and sample frequency (Experiment 2) to create short and long contexts while maintaining consistent test ranges and standards across different sessions. The results revealed that the bisection threshold shifted towards the ensemble mean, and both CNV and LPCt were sensitive to context modulation. In the short context, the CNV exhibited an increased climbing rate compared to the long context, whereas the LPCt displayed reduced amplitude and latency. These findings suggest that the CNV represents an expectancy wave preceding a temporal decision process, while the LPCt reflects the decision-making process itself, with both components influenced by the temporal context.
引用
收藏
页码:2081 / 2096
页数:16
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