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Predictable repetition influences time perception, making discrimination harder. Participants perceived stimuli matching expectations as longer, impacting subjective duration and context effects in time estimation.

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Area of Science:

  • Cognitive Psychology
  • Psychophysics
  • Time Perception

Background:

  • Stimulus repetition typically shortens perceived duration.
  • Predictable repetition may, however, lengthen subjective duration (Matthews, 2015).
  • The perceptual basis of this repetition effect remains empirically unverified.

Purpose of the Study:

  • To investigate perceptual and decisional factors in the repetition effect.
  • To examine how varying repetition probabilities influence time perception.
  • To test the hypothesis that predictable repetition affects subjective duration perception.

Main Methods:

  • Employed psychophysical methods with 60 participants judging stimulus duration.
  • Utilized a replication of Matthews' (2015) paradigm and an extension task.
  • Varied probabilities of stimulus repetition and comparison durations (200–1,250 ms).

Main Results:

  • No significant bias was observed in duration judgments.
  • Increased repetition probability made perceptual discrimination more difficult.
  • Participants judged stimuli aligning with expectations (repetition or novelty) as longer.

Conclusions:

  • Modulating repetition expectations impacts time perception, not just decision bias.
  • The findings support a perceptual account of the repetition effect on subjective duration.
  • Results have implications for understanding context effects and time estimation models.