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Aging and guided visual search: the role of visual working memory
Sowon Hahn1, Daniel R Buttaccio2
1a Department of Psychology , Seoul National University , Seoul , Korea.
Summary
Older adults struggle with visual search guided by learned associations compared to younger adults. Working memory capacity influences these age-related differences in visual search performance.
Area of Science:
- Cognitive Psychology
- Neuroscience
- Human Aging Research
Background:
- Learned associations play a crucial role in guiding efficient visual search.
- Age-related cognitive changes can impact the ability to utilize learned information during tasks.
- Visual working memory capacity (VWMC) is a key cognitive resource that may mediate these effects.
Purpose of the Study:
- To investigate age-related differences in using learned object-color associations to guide visual search.
- To examine how the number of associated target colors (one vs. two) affects search performance.
- To determine the role of visual working memory capacity (VWMC) in modulating age effects on cued visual search.
Main Methods:
- Participants (younger and older adults) performed a visual search task following an object cue.
- The cue was associated with either one or two target colors.
- Reaction times (RTs), visual search slopes, and error rates were measured.
- Regression analyses were used to assess the relationship between VWMC and search performance.
Main Results:
- Older adults exhibited slower RTs, steeper visual search slopes, and poorer cue-target association knowledge than younger adults.
- Search RTs and error rates increased when cues were associated with two colors compared to one.
- Visual search slopes were not affected by the number of associated colors, suggesting parallel activation or direct memory retrieval.
- VWMC significantly predicted both visual search performance and cue-target association knowledge.
Conclusions:
- Age-related declines affect the ability to use learned associations for visual search.
- VWMC is a critical factor that can predict and potentially mitigate age-related impairments in cued visual search.
- Findings suggest mechanisms for simultaneous template activation or direct associative retrieval from memory.
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