Mislocalization in saccadic suppression of displacement
1Institute for Experimental Psychology, Heinrich Heine University Düsseldorf, Universitätsstraße 1, 40225 Düsseldorf, Germany.
Vision Research
|March 6, 2022
Summary
During saccades, people misperceive target location. This study found participants incorrectly reported the pre-saccadic target
Area of Science:
- Neuroscience
- Cognitive Psychology
- Vision Science
Background:
- Visual stability is crucial for distinguishing self-motion from external motion.
- Trans-saccadic target displacement perception is a key area of study.
- Human performance in discriminating saccadic target shifts is typically poor.
Purpose of the Study:
- To investigate visual perception during saccades.
- To examine how target displacement direction affects localization accuracy.
- To understand the mechanisms of visual stability across eye movements.
Main Methods:
- Participants performed saccades to a target.
- The target was displaced during saccade execution (backward or forward).
- Participants reported the perceived location of either the pre- or post-saccadic target.
Main Results:
- Subjects mislocalized the pre-saccadic target to the post-saccadic position.
- This mislocalization was observed specifically after backward target displacements.
- No significant mislocalization occurred following forward target displacements.
Conclusions:
- Saccadic eye movements can lead to significant visual misperceptions.
- The direction of target displacement during a saccade influences localization errors.
- These findings provide insights into the neural processing of visual stability during self-initiated eye movements.
