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Aging and the development of automaticity in conjunction search
C T Scialfa1, L Jenkins, E Hamaluk
1University of Calgary, Alberta, Canada. scialfa@aucalgary.ca
Summary
Younger and older adults show similar visual search abilities, including how they adapt to changing search rules. Age does not significantly impact visual attention or feature selection during search tasks.
Area of Science:
- Cognitive Psychology
- Neuroscience
- Human Factors
Background:
- Visual search performance can vary with age, particularly in complex tasks.
- Understanding age-related differences in visual attention is crucial for various applications.
- Feature-based attention plays a key role in efficient visual search.
Purpose of the Study:
- To investigate age differences in visual search performance.
- To examine how younger and older adults adapt to changes in search rules (reversal conditions).
- To explore the role of feature-based selectivity in visual attention across age groups.
Main Methods:
- Two experiments involving feature and conjunction visual search tasks.
- Consistent-mapping (CM) training followed by reversal conditions.
- Measurement of reaction time, display size effects, and fixation patterns (number, duration, selectivity).
Main Results:
- Both age groups exhibited parallel search and equivalent disruption at reversal.
- Display size effects were substantial and similar in magnitude for younger and older observers.
- No significant age differences were found in conjunction search improvement or reversal disruption.
- Both groups struggled to reverse feature selectivity when target features changed.
Conclusions:
- Age differences in visual search are minimal, particularly concerning adaptation to changing task demands.
- Feature-based selectivity in visual attention is robust but difficult to reverse across age groups.
- Findings have implications for visual attention models and understanding age-related cognitive changes.