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Related Experiment Video

Updated: Apr 21, 2026

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

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

Published on: March 18, 2019

Trade-off between spatiotopy and saccadic plasticity.

Thérèse Collins¹

¹Laboratoire Psychologie de la Perception, Paris, France.

Journal of Vision

|October 29, 2014

Summary

Visual stability relies on remapping eye movements, not a null hypothesis. Accurate remapping aids eye movement accuracy but not necessarily visual stability, suggesting separate internal uses for eye movement copies.

Area of Science:

Neuroscience
Cognitive Science
Visual Perception

Background:

Saccadic eye movements shift gaze but visual perception remains stable.
Visual stability is debated: either a null hypothesis (no movement during saccades) or remapping (updating retinal images using eye movement copies).

Purpose of the Study:

To disentangle the null hypothesis and remapping theories of visual stability.
To investigate how the visual system adapts to discrepancies between saccade endpoints and visual targets.

Main Methods:

Subjects performed saccades to targets with varying displacements during execution.
Participants detected or discriminated the direction of target displacement.
Saccade amplitude adjustments were analyzed based on perceptual performance and retinal error.

Keywords:

saccadic adaptation spatiotopy visual stability

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Last Updated: Apr 21, 2026

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Main Results:

Perceptual performance was poorer under the null hypothesis condition and independent of saccade endpoint when remapping occurred.
A trade-off exists: better visual perception (spatiotopic performance) correlated with smaller saccade adjustments, while poorer performance led to larger adjustments.
Saccade amplitude variations depended on retinal error size and saccade magnitude.

Conclusions:

The visual system distinguishes between object displacement and saccade error, correcting subsequent saccades accordingly.
Accurate remapping serves oculomotor accuracy but not necessarily visual stability.
Internal eye movement copies are utilized distinctly for spatiotopic representation and oculomotor control.