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Temporal Context Actively Shapes EEG Signatures of Time Perception
Atser Damsma1, Nadine Schlichting2, Hedderik van Rijn2
1Department of Psychology, University of Groningen, Groningen, 9712 TS, The Netherlands a.damsma@rug.nl.
Summary
Temporal context actively shapes our perception of time, biasing duration estimates. This study reveals that neural activity during perception, not just memory, reflects this temporal context influence.
Area of Science:
- Neuroscience
- Cognitive Psychology
- Psychophysics
Background:
- Subjective time perception is influenced by temporal regularities.
- The central tendency effect shows overestimation of short and underestimation of long intervals.
- Current models often attribute this to post-perceptual memory weighting.
Purpose of the Study:
- To investigate if temporal context actively tunes duration perception during encoding.
- To examine the neural dynamics underlying context-dependent time perception using EEG.
- To determine if temporal context can be decoded from neural signals.
Main Methods:
- Interval reproduction task with varying duration ranges.
- Electroencephalography (EEG) recording during interval perception.
- Multivariate pattern analysis (MVPA) of EEG data.
Main Results:
- Reproductions were biased towards the mean duration of the presented range.
- EEG showed context-dependent neural dynamics during perception (e.g., altered contingent negative variation, P2, beta power).
- Temporal context was decodable from EEG signals shortly after interval onset and offset.
Conclusions:
- Temporal context actively influences the perception of duration, not just post-perceptual stages.
- Neural signatures flexibly adapt to temporal context during perceptual encoding.
- This provides evidence for dynamic expectations shaping subjective time.
