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Related Experiment Video

Updated: Mar 12, 2026

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Practice improves peri-saccadic shape judgment but does not diminish target mislocalization.

Yuval Porat1,2, Ehud Zohary3,2

  • 1The Edmond and Lily Safra Center for Brain Sciences, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.

Proceedings of the National Academy of Sciences of the United States of America
|November 4, 2016
PubMed
Summary
This summary is machine-generated.

Practice can improve visual perception during eye movements, enhancing orientation and shape discrimination. However, this training does not affect the typical mislocalization of stimuli during saccades, suggesting it is an automatic process.

Keywords:
perceptual learningsaccadessaccadic mislocalizationsaccadic suppressionvision

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Visual Perception

Background:

  • Visual sensitivity decreases during eye movements (saccades).
  • Peri-saccadic vision involves stimulus mislocalization towards the saccadic target.
  • These phenomena were traditionally considered fixed aspects of peri-saccadic vision.

Purpose of the Study:

  • To investigate if perceptual performance during saccades can be improved with practice.
  • To determine if practice affects peri-saccadic visual sensitivity and stimulus mislocalization.

Main Methods:

  • Subjects performed orientation or location discrimination of ellipse stimuli presented during saccades.
  • Training involved repeated trials of peri-saccadic orientation discrimination.
  • Generalization of training effects was tested across different saccade directions, locations, and tasks (Vernier discrimination).

Main Results:

  • Practice led to lasting improvements in peri-saccadic orientation and shape discrimination.
  • Training did not alter the extent of saccadic stimulus mislocalization.
  • Discrimination gains generalized to untrained conditions but not to novel tasks like Vernier discrimination.
  • Practice on location tasks did not improve localization or discrimination.

Conclusions:

  • Perceptual learning can enhance the use of limited visual information during saccades, possibly through attention or improved information readout.
  • Saccadic mislocalization appears to be an automatic, non-modifiable process, likely driven by efference copy signals.