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Time compression of visual perception around microsaccades.

Gongchen Yu1,2, Mingpo Yang1, Peng Yu1,2

  • 1Institute of Neuroscience, Key Laboratory of Primate Neurobiology, Chinese Academy of Sciences, Shanghai, China; and.

Journal of Neurophysiology
|March 17, 2017
PubMed
Summary

Tiny eye movements called microsaccades compress our perception of time, making visual events seem shorter. This temporal distortion extends over 400 milliseconds around each microsaccade, affecting visual timing.

Keywords:
humanmicrosaccadestime compressiontime perceptionvisual perception

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Area of Science:

  • Neuroscience
  • Visual Perception
  • Chronobiology

Background:

  • The human eye is in constant motion, even during fixation, with frequent small, rapid eye movements known as microsaccades.
  • Previous research indicates microsaccades alter spatial perception, compressing visual space.
  • The relationship between visual space and time perception suggests microsaccades may also influence temporal judgments.

Purpose of the Study:

  • To investigate whether microsaccades affect the temporal aspects of visual perception.
  • To determine the extent and characteristics of temporal distortions associated with microsaccades.

Main Methods:

  • Participants viewed transient visual stimuli.
  • Microsaccade activity was monitored during stimulus presentation.
  • Perceived duration of visual stimuli was measured in relation to microsaccade occurrence.

Main Results:

  • The perceived interval between visual stimuli was compressed when accompanied by microsaccades.
  • This temporal compression effect extended approximately ±200 milliseconds around each microsaccade.
  • The pattern and number of microsaccades influenced the degree of temporal compression, with multiple microsaccades sometimes enhancing or counteracting the effect.

Conclusions:

  • Microsaccades significantly alter visual time perception, causing a compression of perceived duration.
  • The temporal effects of microsaccades are similar to those of larger saccades, suggesting shared neural mechanisms.
  • Extraretinal mechanisms likely mediate these saccade-induced misperceptions of time and space.