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Updated: Jul 8, 2025

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity
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Sound reduces saccadic chronostasis illusion.

Mengdie Zhai1, Hongxiao Wu2, Yajie Wang3

  • 1Department of Psychology, School of Education, Soochow University, Suzhou, Jiangsu 215123, China.

Vision Research
|December 18, 2023
PubMed
Summary
This summary is machine-generated.

Saccadic chronostasis, an illusion of overestimating time after eye movements, was not found in hearing. Synchronous sounds reduced this visual illusion, suggesting sound dominates visual time perception during saccades.

Keywords:
ChronostasisCross-modal integrationSaccadesTemporal ventriloquismTime dilation

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Area of Science:

  • Neuroscience
  • Auditory Perception
  • Visual Perception

Background:

  • Saccadic chronostasis, or the "stopped clock illusion," is the overestimation of visual stimulus duration following saccadic eye movements.
  • Previous research has primarily focused on the visual modality, leaving the auditory modality unexplored.

Purpose of the Study:

  • To investigate the presence of saccadic chronostasis in the auditory modality.
  • To determine if auditory stimuli can modulate the saccadic chronostasis illusion in the visual modality.
  • To examine the cross-modal interactions between auditory and visual stimuli during saccades in time perception.

Main Methods:

  • Participants judged the duration of visual, auditory, or audio-visual stimuli presented around saccadic eye movements.
  • Stimuli durations varied (200-800 ms) against a fixed 500 ms standard stimulus.
  • The study compared perceived duration in unisensory and bimodal conditions.

Main Results:

  • Saccadic chronostasis was not observed in the auditory modality, even with synchronous audio-visual stimuli.
  • A synchronously presented sound significantly reduced the magnitude of the visual saccadic chronostasis illusion.
  • The cross-modal effect of sound on visual time perception during saccades was more substantial than the saccade-induced visual time dilation.

Conclusions:

  • Auditory stimuli do not exhibit saccadic chronostasis.
  • Sound plays a dominant role in modulating time perception during saccades, reducing the visual saccadic chronostasis illusion.
  • These findings support the Scalar Expectancy Theory, indicating that cross-modal auditory influences are significant in saccade-related temporal processing.