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Sustained attention and aging: overcoming the decrement?
1National Institute on Aging, Baltimore, Maryland, USA. Leonard-Giambra@NIH.GOV
Experimental Aging Research
|April 1, 1997
Summary
Older adults showed no decline in sustained attention performance. However, they made more false alarms, suggesting potential age-related differences in vigilance tasks.
Area of Science:
- Cognitive Psychology
- Neuroscience
- Gerontology
Background:
- Evidence on age-related declines in sustained attention (vigilance) is inconsistent.
- Previous research suggested age effects, particularly in tasks by Parasuraman and Giambra (1991).
Purpose of the Study:
- To investigate age effects on sustained attention by minimizing non-attentional components.
- To test the hypothesis that reduced perceptual and information-processing abilities contribute to age-related declines in vigilance tasks.
Main Methods:
- Three tasks were conducted with large adult samples (n=457, 427, 417).
- Tasks 1 and 2 replicated Parasuraman and Giambra's (1991) procedure and stimuli.
- Task 3 minimized non-sustained attention demands to isolate vigilance performance.
Main Results:
- No significant age effects were found for detection accuracy or detection time decrement in Tasks 1 and 2.
- Older adults exhibited significantly more false alarms than younger adults.
- Task 3 revealed marginal evidence of age effects on sustained attention.
Conclusions:
- Age-related declines in sustained attention may be minimal or task-dependent.
- Increased false alarms in older adults warrant further investigation.
- Future research should control for visual difficulties and consider sampling biases.