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Encoding, working memory, or decision: how feedback modulates time perception.

Langyu Li1, Chunna Hou1, Chunhua Peng2

  • 1Key Laboratory of Cognition and Personality (Ministry of Education), Faculty of Psychology, Time Psychology Research Center, Center of Studies for Psychology and Social Development, Southwest University, Chongqing 400715, China.

Cerebral Cortex (New York, N.Y. : 1991)
|July 31, 2023
PubMed
Summary
This summary is machine-generated.

Accurate time perception within 3 seconds is debated. This study shows feedback reduces overestimation by minimizing response bias, not by improving time representation itself, suggesting accurate short interval timing.

Keywords:
event-related potentialfeedbackscalar timing modeltemporal estimation biastime reproduction task

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Area of Science:

  • Cognitive Neuroscience
  • Psychology
  • Neuroscience

Background:

  • The ability to accurately represent short temporal intervals (under 3 seconds) is crucial for theoretical models of temporal processing.
  • A common finding is overestimation of these intervals, but its cause (inaccurate representation vs. response bias) remains unclear.

Purpose of the Study:

  • To investigate whether feedback influences temporal overestimation at different stages of timing: encoding, working memory, and decision-making.
  • To differentiate between inaccurate time representation and response bias as causes of temporal overestimation.

Main Methods:

  • Participants reproduced time intervals with or without feedback while electroencephalogram (EEG) was recorded.
  • Behavioral analysis of reproduced times and EEG analysis of brain activity, specifically contingent negative variation (CNV) and P2-P3b amplitudes.

Main Results:

  • Feedback significantly reduced overestimation and shortened reproduced time intervals.
  • EEG data revealed that feedback decreased CNV amplitude during the decision stage but did not affect encoding stage CNV or working memory stage P2-P3b amplitudes.

Conclusions:

  • Temporal overestimation within 3 seconds likely stems from response bias during behavioral output, rather than inaccurate internal time representation.
  • Electrophysiological evidence supports the concept of 'temporal gestalt,' where short intervals are accurately perceived.