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Aging and time-sharing aspects of executive control
Timothy A Salthouse1, James D Miles
1Department of Psychology, University of Virginia, Charlottesville 22904-4400, USA. salthouse@virginia.edu
Memory & Cognition
|August 20, 2002
Summary
This study investigated the impact of age on the ability to multitask, finding that older adults showed reduced time-sharing efficiency. Better multitasking skills correlated with improved spatial, reasoning, and memory performance in adults.
Area of Science:
- Cognitive Psychology
- Neuroscience
- Human Development
Background:
- Executive functioning is crucial for daily life, with task coordination being a key component.
- Age-related cognitive decline often impacts executive functions, affecting multitasking abilities.
Purpose of the Study:
- To examine the role of time-sharing ability in age-related differences in cognitive performance.
- To investigate the relationship between time-sharing efficiency and other cognitive functions across adulthood.
Main Methods:
- 150 adults aged 20-91 performed a visual-motor tracking task under three dual-task conditions.
- Participants completed additional cognitive tasks to assess correlations with time-sharing efficiency.
- Statistical analyses examined time-sharing costs and their relation to age and other cognitive variables.
Main Results:
- A distinct time-sharing ability was supported by significant correlations among dual-task costs.
- Time-sharing costs were weakly correlated with other cognitive variables, suggesting specificity.
- Increased age was associated with decreased time-sharing ability.
Conclusions:
- Time-sharing ability declines with age, impacting cognitive performance.
- Efficient multitasking is linked to better spatial, reasoning, and memory abilities.
- Executive processes contribute to age differences in cognition, though perceptual speed effects were larger.