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Related Experiment Video

Updated: Jun 3, 2026

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity
06:46

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity

Published on: March 18, 2019

Temporal uncertainty separates flashes from their background during saccades.

Femke Maij1, Eli Brenner, Jeroen B J Smeets

  • 1Research Institute MOVE, Faculty of Human Movement Sciences, VU University, 1081 BT Amsterdam, The Netherlands.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|March 11, 2011
PubMed
Summary
This summary is machine-generated.

Perisaccadic spatial mislocalization, or errors in locating flashed objects near eye movements (saccades), is not due to spatial shifts. Temporal uncertainty about the flash timing better explains these visual perception errors.

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Last Updated: Jun 3, 2026

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity
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Eye Movements in Visual Duration Perception: Disentangling Stimulus from Time in Predecisional Processes

Published on: January 19, 2024

Area of Science:

  • Visual perception
  • Neuroscience
  • Cognitive psychology

Background:

  • Spatial localization of flashed objects is impaired during rapid eye movements (saccades).
  • Existing theories propose spatial shifts and deformations in the brain's spatial representation to explain this perisaccadic mislocalization.
  • These models predict that ordinal relationships between scene elements remain intact.

Purpose of the Study:

  • To investigate the mechanisms underlying perisaccadic spatial mislocalization.
  • To test whether existing models of spatial shifts and deformations adequately explain observed mislocalization patterns.
  • To propose and validate an alternative model for perisaccadic visual errors.

Main Methods:

  • An experiment was conducted presenting flashes on a red and green background to human subjects.
  • Participants reported the perceived location of flashes presented around the time of a saccade.
  • A computational model was developed combining temporal uncertainty and a gaze-bias to explain the results.

Main Results:

  • Flashes on green background regions were often reported as red, and vice versa, during saccades.
  • This color-based mislocalization contradicts models solely based on spatial shifts or deformations.
  • The developed model accurately reproduced the observed spatial mislocalization patterns.

Conclusions:

  • Perisaccadic spatial mislocalization is not adequately explained by simple shifts or deformations of perceived space.
  • Temporal uncertainty regarding the flash's timing, combined with a bias towards the direction of gaze, provides a robust explanation.
  • The findings highlight the critical role of temporal factors in visual spatial perception during eye movements.