The adaptive global effect: Luminance contrast modulates the global effect zone
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View abstract on PubMed
Summary
This summary is machine-generated.The saccade averaging zone expands when a distractor is more luminous than the target, demonstrating its adaptive nature. This zone also increases with higher luminance and shorter saccadic response times.
Area Of Science
- Neuroscience
- Vision Science
- Oculomotor Research
Background
- Saccadic eye movements exhibit a 'global effect' or 'saccade averaging' when objects are near.
- This averaging phenomenon diminishes with increased object separation.
- The adaptability of the saccade averaging zone to object features remains largely unexplored.
Purpose Of The Study
- To investigate if the saccade averaging zone adapts to variations in object luminance contrast.
- To determine the influence of relative and absolute luminance on the averaging zone size.
Main Methods
- Two experiments involving saccadic eye movements were conducted.
- Observers' saccades were recorded while target and distractor luminance varied.
- The size of the saccade averaging zone was systematically assessed under different luminance conditions.
Main Results
- A larger averaging zone was observed when the distractor had higher luminance relative to the target.
- Saccade averaging persisted even with remote distractors.
- Equiluminant targets and distractors showed no change in the averaging zone with absolute luminance.
- Increased relative and absolute luminance enlarged the averaging zone, particularly with shorter saccadic response times.
Conclusions
- The saccade averaging zone is adaptive to luminance contrast.
- The size of the averaging zone increases with higher relative luminance and shorter saccadic response times.
- Luminance contrast plays a crucial role in modulating oculomotor averaging behavior.
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