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Are Age-Related Differences Uniform Across Different Inhibitory Functions?
Kiran K Vadaga1, Mervin Blair2, Karen Z H Li3
1Centre for Research in Human Development and Department of Psychology, Concordia University, Montréal, Québec, Canada. kiran.vadaga@gmail.com.
Summary
Older adults show greater age-related declines in inhibitory control, particularly in restraint and deletion functions, compared to younger adults. Access inhibition remained unaffected by age.
Area of Science:
- Cognitive Neuroscience
- Human Aging Research
Background:
- Inhibitory control is crucial for cognitive function and declines with age.
- Proactive and reactive control are key processes underlying inhibitory functions.
Purpose of the Study:
- To investigate the age-sensitivity of three distinct inhibitory functions: access, deletion, and restraint.
- To examine the role of proactive and reactive control in age-related inhibitory declines.
Main Methods:
- A sequential flanker task was employed to measure inhibitory functions in young (18-35) and older adults (60-75).
- Participants memorized word sequences and responded to targets amidst flankers, with specific trial types targeting access, deletion, and restraint.
Main Results:
- Significant age-related differences were observed in restraint and deletion inhibitory functions.
- No age-related differences were found in the access inhibitory function.
Conclusions:
- The magnitude of age-related differences in inhibitory functions is linked to the level of proactive control required.
- Restraint and deletion, which rely more on proactive control, show greater age-related declines.
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