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A Two-interval Forced-choice Task for Multisensory Comparisons
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Individual alpha frequency predicts the sensitivity of time perception.

Audrey Morrow1,2, Montana Wilson1,3, Michaela Geller-Montague1

  • 1University of California, Santa Cruz, Santa Cruz, CA, United States.

Imaging Neuroscience (Cambridge, Mass.)
|June 8, 2026
PubMed
Summary

Individual alpha frequency (IAF) correlates with precision in time perception, not bias. Higher IAF is linked to better sensitivity in judging visual durations, suggesting a role in perceptual timing.

Keywords:
alpha oscillationsduration discriminationduration estimationindividual differencestime perception

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Area of Science:

  • Neuroscience
  • Cognitive Psychology

Background:

  • Individual differences in alpha-band oscillations are linked to temporal perception.
  • The precise role of the human alpha rhythm in time perception remains debated.

Purpose of the Study:

  • To investigate the association between individual alpha frequency (IAF) and sensitivity/bias in judging visual durations.
  • To evaluate IAF's role across various peri-second visual durations (100-1200 ms).

Main Methods:

  • Electroencephalography (EEG) was used in 55 participants.
  • Participants completed temporal estimation and discrimination tasks with static and dynamic visual stimuli.
  • Stimulus durations ranged from 100 ms to 1200 ms.

Main Results:

  • IAF significantly correlated with the variance of duration estimates (precision), but not average estimates (bias).
  • Psychometric function slopes (sensitivity) positively correlated with IAF, especially for static stimuli.
  • These findings were consistent across tested durations and controlled for age.

Conclusions:

  • IAF is associated with individual differences in the precision of time perception.
  • Alpha rhythm activity may influence the sensitivity of visual duration judgments.