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Updated: Jun 17, 2026

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity
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Apparent motion during saccadic suppression periods.

Robert Scott Allison1, Jens Schumacher, Shabnam Sadr

  • 1Department of Computer Science and Engineering, Centre for Vision Research, York University, 4700 Keele St., Toronto, ON, M3J 1P3, Canada. allison@cse.yorku.ca

Experimental Brain Research
|December 22, 2009
PubMed
Summary
This summary is machine-generated.

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Visual sensitivity to image displacement decreases during eye movements (saccades). This study found that trans-saccadic motion perception is reduced in both detectability and perceived magnitude compared to fixation.

Area of Science:

  • Visual perception
  • Oculomotor control
  • Psychophysics

Background:

  • Visual sensitivity is generally reduced during eye movements (saccades) compared to fixation.
  • Understanding trans-saccadic perception is crucial for comprehending real-world visual processing.

Purpose of the Study:

  • To investigate the detectability and perceived magnitude of image displacements during saccades.
  • To compare trans-saccadic visual motion perception with perception during fixation.

Main Methods:

  • Experiments involved presenting ecologically relevant scene translations during horizontal saccades and fixation.
  • A two-interval forced-choice procedure and magnitude estimation were used to assess perceived motion.
  • Observers' sensitivity to image displacement was measured.

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Related Experiment Videos

Last Updated: Jun 17, 2026

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity
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Published on: March 18, 2019

Using Saccadometry with Deep Brain Stimulation to Study Normal and Pathological Brain Function
05:44

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Published on: July 14, 2016

Eye Tracking Young Children with Autism
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Main Results:

  • Image displacements were significantly less detectable during saccades than during fixation.
  • Trans-saccadic displacements were perceived as smaller in magnitude compared to inter-saccadic displacements.
  • Detected trans-saccadic changes were less salient and appeared slower.

Conclusions:

  • The magnitude of the apparent motion signal is attenuated during saccades.
  • Both the detectability and perceived magnitude of visual motion are reduced during saccadic eye movements.