Multimodal coding and strategic approach in young and older adults' visual working memory performance
Louise A Brown Nicholls1, Brad English2
1School of Psychological Sciences & Health, University of Strathclyde, Glasgow, UK.
Summary
Older adults show reduced visual working memory (WM) capacity and strategy use compared to younger adults. However, both age groups benefit from semantic information, suggesting compensatory potential.
Area of Science:
- Cognitive Psychology
- Neuroscience
- Human Development
Background:
- Visual working memory (WM) is crucial for cognitive tasks.
- Age-related cognitive decline can impact WM performance.
- Understanding strategy use in WM is key to identifying compensatory mechanisms.
Purpose of the Study:
- To investigate age-related differences in visual working memory (WM) capacity and strategy use.
- To explore the impact of visual and verbal processing on WM performance in young and older adults.
- To examine how task meaningfulness influences strategy selection and WM efficiency across age groups.
Main Methods:
- Two experiments were conducted involving young (18-35 yrs) and older (63-88 yrs) adults.
- Experiment 1 used a visual interference paradigm to assess visual rehearsal in an abstract visual WM task.
- Experiment 2 introduced a more meaningful task version to allow for multimodal coding and assess semantic benefits.
Main Results:
- Both young and older adults initially employed visual strategies for the WM task.
- Older adults experienced greater difficulty with visual interference, suggesting challenges in adopting non-visual strategies.
- Despite age-related differences in WM capacity, both groups equally benefited from semantic information, indicating potential for compensation.
- Older adults reported less verbal labeling and more visual refreshing, alongside a less efficient overall approach.
Conclusions:
- Age-related limitations exist in visual working memory capacity and strategy utilization.
- Semantic availability can be leveraged by both young and older adults to enhance WM performance.
- Task practice and the potential for compensatory strategies offer promising avenues for mitigating age-related WM deficits.
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