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Inhibitory attentional mechanisms and aging
M J Kane1, L Hasher, E R Stoltzfus
1Department of Psychology, Social and Health Science, Duke University, Durham, North Carolina 27706.
Psychology and Aging
|March 1, 1994
Summary
Older adults appear to process distractors but struggle with distractor suppression, failing to engage inhibitory mechanisms. This study investigated age-related differences in cognitive control and attention.
Area of Science:
- Cognitive Psychology
- Neuroscience
- Aging Research
Background:
- Distractor suppression is a key component of cognitive control.
- Previous research suggests age-related declines in inhibitory functions.
- Understanding these declines is crucial for addressing cognitive aging.
Purpose of the Study:
- To investigate whether older adults exhibit distractor suppression.
- To examine age-related differences in inhibitory mechanisms.
- To explore the relationship between suppression, interference, and everyday cognitive failures.
Main Methods:
- Two experiments were conducted, adapting a distractor suppression task.
- Experiment 1 used a sensitive measure for suppression.
- Experiment 2 employed longer stimulus exposure to account for slowed processing.
Main Results:
- Neither experiment successfully elicited distractor suppression in older adults.
- Both age groups showed parallel facilitatory effects.
- Older adults processed distractors but did not inhibit them effectively.
Conclusions:
- Older adults may have deficits in inhibitory control, not just processing speed.
- The findings align with attentional framework models of cognitive aging.
- No significant relationship was found between reaction time effects and self-reported cognitive lapses.