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Bilingualism interacts with domain in a working memory task: evidence from aging.
Lin Luo1, Fergus I M Craik, Sylvain Moreno
1Department of Psychology, York University, Toronto, Canada.
Psychology and Aging
|January 2, 2013
Summary
Bilinguals excel in spatial working memory (WM) tasks, while monolinguals perform better in verbal WM. These differences persist across age groups, suggesting language experience impacts specific cognitive functions.
Area of Science:
- Cognitive Psychology
- Neuroscience
- Linguistics
Background:
- Aging impacts cognitive functions, particularly working memory (WM).
- Bilingualism is hypothesized to confer cognitive advantages, potentially influencing executive functions.
- Understanding how language experience interacts with age and cognitive domains is crucial.
Purpose of the Study:
- To investigate the effects of aging and bilingualism on verbal and spatial working memory.
- To examine whether bilingualism confers a domain-general advantage or impacts specific WM tasks differently.
- To explore the consistency of these effects across the adult lifespan.
Main Methods:
- Participants: Younger and older adults, categorized as monolingual or bilingual.
- Tasks: Verbal and spatial working memory span tasks were administered.
- Analysis: Performance differences between language groups and age groups were analyzed.
Main Results:
- Aging led to a more pronounced decline in spatial WM compared to verbal WM.
- Age-related declines in both verbal and spatial WM were similar between monolingual and bilingual groups.
- Bilingual participants showed superior performance in spatial WM but lower performance in verbal WM compared to monolinguals.
- This interaction between bilingualism and WM domain was observed across all age groups.
Conclusions:
- Bilingualism appears to provide a domain-general executive processing advantage that benefits spatial working memory.
- The specific content of verbal working memory tasks may not fully engage this bilingual advantage, leading to lower performance.
- These findings highlight a complex interplay between language experience, aging, and domain-specific cognitive functions.
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