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Remapping versus short-term memory in visual stability across saccades
Rodrigo Balp1, Florian Waszak1, Thérèse Collins2
1Laboratoire Psychologie de la Perception, Université Paris Descartes & CNRS, 45 rue des Saint-Pères, Paris, France.
Attention, Perception & Psychophysics
|October 12, 2018
Summary
Visual stability during saccadic eye movements is maintained by tracking target location, not orientation. Introducing a blank period improved location accuracy but not orientation change detection.
Area of Science:
- Cognitive Neuroscience
- Visual Perception
- Human Psychophysics
Background:
- Saccadic eye movements cause retinal image displacement.
- Despite saccades, visual experience remains stable.
- Mechanisms for visual stability include internal saccade copies or short-term memory retention.
Purpose of the Study:
- Investigate mechanisms supporting visual stability across saccades.
- Determine if target location or orientation is key for transsaccadic correspondence.
- Examine the role of a blank interval in visual stability.
Main Methods:
- Healthy adults performed saccades to Gabor patches.
- Target location and/or orientation changed mid-saccade or after a blank.
- Participants reported location or orientation changes.
Main Results:
- Transsaccadic displacement discrimination improved with a blank interval.
- Feature changes (location or orientation) did not enhance performance.
- Orientation change discrimination was unaffected by blanks or irrelevant displacements.
Conclusions:
- Visual stability across saccades relies on tracking target location.
- Orientation is not a critical feature for transsaccadic correspondence.
- Internal saccade copies may be more important than short-term feature memory.
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