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Visual Duration but Not Numerosity Is Distorted While Running.

Irene Petrizzo1, Giovanni Anobile1, Eleonora Chelli1

  • 1Department of Neuroscience, Psychology, Pharmacology and Child Health, University of Florence, 50135 Florence, Italy.

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Physical exercise alters time perception, making durations seem longer. However, this effect is specific to time and does not impact the perception of quantity, suggesting a domain-selective influence.

Keywords:
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Area of Science:

  • Cognitive psychology
  • Neuroscience
  • Perception science

Background:

  • Action and perception are known to interact in processing magnitudes like duration and numerosity.
  • Sustained physical exercise, such as running, has been shown to increase the perceived duration of visual stimuli.
  • The impact of exercise on numerosity perception remains unexplored.

Purpose of the Study:

  • To investigate the effect of physical exercise on numerosity perception.
  • To compare the influence of exercise on temporal versus numerical magnitude perception.

Main Methods:

  • Participants performed temporal or numerical judgments on stimuli presented during rest versus while running.
  • Standard stimuli were used for comparison in both duration and numerosity tasks.

Main Results:

  • Physical activity significantly expanded perceived duration, confirming previous findings.
  • Perceived numerosity remained unaffected by physical activity.
  • Temporal distortions diminished rapidly post-exercise, suggesting non-physiological mechanisms.

Conclusions:

  • Motor system engagement selectively influences time perception, not general magnitude processing.
  • The findings suggest distinct neural pathways for processing time and quantity.
  • Exercise-induced temporal distortions are likely cognitive rather than purely physiological.