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General Slowing and Education Mediate Task Switching Performance Across the Life-Span
Luca Moretti1, Carlo Semenza1,2, Antonino Vallesi1,2
1Padova Neuroscience Center, Department of Neuroscience, University of Padova, Padova, Italy.
Frontiers in Psychology
|May 22, 2018
Summary
Older adults show higher switching costs in cognitive flexibility tasks, influenced by processing speed and cognitive reserve. Formal education specifically benefits performance under time pressure, highlighting distinct cognitive reserve dimensions.
Area of Science:
- Cognitive Psychology
- Neuroscience
- Gerontology
Background:
- Cognitive flexibility is crucial for adapting to changing environments.
- Cognitive reserve (CR) and general slowing are proposed to influence cognitive performance across the lifespan.
- Understanding factors modulating cognitive flexibility is essential for healthy aging.
Purpose of the Study:
- To investigate the roles of cognitive reserve and general slowing in cognitive flexibility.
- To examine how time constraints affect task-switching performance.
- To differentiate the impact of various cognitive reserve dimensions on cognitive flexibility.
Main Methods:
- Ninety-eight adults completed a task-switching paradigm with manipulated cue-target timing.
- Working memory demands were minimized using transparent cues.
- Data on cognitive integrity, depression, processing speed, and CR dimensions were collected and analyzed.
Main Results:
- Older adults exhibited similar mixing costs but higher switching costs.
- General slowing showed an age-dependent effect on switching costs.
- Processing speed's impact on task performance decreased with more preparation time.
- Formal education, a CR dimension, was linked to reduced switch costs under time pressure.
Conclusions:
- Distinguishing between different dimensions of cognitive reserve is beneficial.
- Processing speed's influence on executive functions is modulated by time constraints.
- Age-related differences in task-switching costs may depend on working memory demands.
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