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Published on: February 14, 2014
Complex semantic processing in old age: does it stay or does it go?
Psychology and Aging
|February 7, 2001
Summary
Older adults show subtle age-related declines in executive control, not core semantic retrieval speed. Set-switching abilities remain relatively intact, suggesting domain-specific age effects.
Area of Science:
- Cognitive Psychology
- Neuroscience
- Gerontology
Background:
- Semantic fluency tasks assess the speed of accessing and producing words from specific categories.
- Age-related cognitive changes can impact various aspects of language production and executive functions.
- Understanding domain-specific versus general age-related cognitive decline is crucial for effective interventions.
Purpose of the Study:
- To investigate age differences in semantic fluency retrieval speed, particularly in a set-switching paradigm.
- To differentiate between age effects on semantic access and nonsemantic processing components.
- To explore the role of executive control in age-related differences in semantic retrieval.
Main Methods:
- Participants included young and older adults (N=24 each).
- Semantic fluency was assessed under standard and set-switching conditions (alternating between two categories).
- Retrieval-position function parameters were used to analyze semantic access speed, controlling for nonsemantic factors.
Main Results:
- Age effects were observed in nonsemantic processing components, not in the speed of semantic retrieval itself.
- Age-related deficits in the set-switching condition were found to be relatively subtle.
- The findings suggest that executive control plays a role in age differences during semantic retrieval.
Conclusions:
- Age-related cognitive decline may be domain-specific, impacting executive functions more than core semantic retrieval.
- Executive control deficits in older adults might manifest subtly in complex tasks like set-switching.
- Further research is needed to fully understand the interplay between executive control and semantic retrieval across the lifespan.
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