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Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity
Published on: March 18, 2019
Perceptual judgment and saccadic behavior in a spatial distortion with briefly presented stimuli
Sonja Stork1, Jochen Müsseler, A H C van der Heijden
1Department of Psychology, Ludwig Maximilian University Munich, Germany.
Advances in Cognitive Psychology
|August 7, 2010
Summary
Observers mislocalize peripheral probes relative to comparison stimuli, likely due to absolute localization differences. This study links these relative mislocalization errors with saccadic behavior, using saccadic amplitude to estimate the effect.
Area of Science:
- Visual perception
- Human psychophysics
- Oculomotor behavior
Background:
- Observers often misjudge the location of peripheral stimuli relative to central ones.
- This relative mislocalization is thought to stem from errors in absolute localization, where stimuli are shifted towards the fovea.
Purpose of the Study:
- To investigate the relationship between relative localization judgments and saccadic eye movement behavior.
- To quantitatively determine how saccadic responses correlate with perceptual mislocalization errors.
Main Methods:
- Three experiments were conducted comparing saccadic behavior with relative localization judgments.
- The study analyzed the quantitative relationship between these two measures.
Main Results:
- A correspondence was found between errors in localization judgments and saccadic behavior.
- Saccadic amplitude was shown to be a reliable predictor of the magnitude of relative mislocalization.
Conclusions:
- Saccadic eye movements play a significant role in the observed relative mislocalization of peripheral visual stimuli.
- The amplitude of saccades can be used to quantify the extent of these perceptual errors.
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