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Mixed pro and antisaccade performance in children and adults
Elizabeth L Irving1, Diana J Tajik-Parvinchi, Linda Lillakas
1University of Waterloo, School of Optometry, Waterloo, Canada. elirving@uwaterloo.ca
Brain Research
|December 24, 2008
Summary
Children primarily made antisaccade errors, while adults showed increased errors in a dual-task condition. This suggests different processing dynamics influence eye movement control in children and adults under cognitive load.
Area of Science:
- Cognitive Neuroscience
- Ophthalmology
- Developmental Psychology
Background:
- Saccadic eye movements, including prosaccades and antisaccades, are crucial for visual attention and information processing.
- Mixed-saccade tasks, where trial type is unpredictable, offer a unique paradigm to study inhibitory control and cognitive flexibility.
- Understanding age-related differences and the impact of cognitive load on saccade performance is vital for diagnosing and treating visual-motor deficits.
Purpose of the Study:
- To compare the performance of children and adults on a mixed-saccade task.
- To investigate the effects of increased working memory load on adult saccade performance.
- To analyze error patterns in prosaccades and antisaccades across different age groups and cognitive conditions.
Main Methods:
- Utilized a video-based eye tracking system to record eye movements.
- Employed a mixed-saccade task where peripheral target color cued saccade type (prosaccade or antisaccade).
- Assessed 22 children (5-12 years) and 44 adults, with a subset of adults performing a dual-task (mental subtraction or number repetition) alongside the saccade task.
Main Results:
- Children predominantly made antisaccade errors, indicating challenges with inhibitory control.
- Adults exhibited increased error rates in the mental subtraction dual-task condition, with both prosaccade and antisaccade errors observed.
- Performance differences between children and adults suggest distinct developmental trajectories in saccade control and cognitive processing.
Conclusions:
- The study highlights significant differences in saccade control between children and adults, particularly in inhibitory processes.
- Increased cognitive load differentially impacts adult saccade accuracy, affecting both prosaccades and antisaccades.
- Findings suggest that varying processing dynamics underlie the observed error patterns in different age groups and cognitive states.
