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Age differences in the principal temporo-spatial components of EEG activity during a proactive interference task
Harry T A Moore1, Adriana Sampaio2, Diego Pinal3
1Psychological Neuroscience Laboratory, CIPsi, University of Minho, Braga, Portugal; Department of Psychology, Catholic University of Murcia (UCAM), Spain.
Biological Psychology
|June 17, 2024
Summary
Older adults show different brain mechanisms than young adults when overcoming proactive interference (PI) in working memory (WM). These age-related differences in PI resolution involve distinct neural activity patterns, suggesting altered cognitive control strategies.
Area of Science:
- Cognitive Neuroscience
- Neuroimaging
- Human Aging Research
Background:
- Proactive interference (PI) impairs working memory (WM) processing by irrelevant prior information.
- Previous research indicates altered PI effects in healthy aging, but underlying brain mechanisms remain unclear.
- Understanding age-related changes in PI resolution is crucial for cognitive aging research.
Purpose of the Study:
- To investigate age-related differences in brain mechanisms underlying proactive interference resolution.
- To compare neural activity patterns during PI tasks in young and older adults using EEG.
- To elucidate how cognitive control strategies differ between age groups when overcoming PI.
Main Methods:
- Utilized a Recent Probes task with electroencephalography (EEG) recording.
- Analyzed EEG data using temporo-spatial principal component analysis.
- Compared behavioral performance (accuracy, reaction time) and neural activity between young and older adults.
Main Results:
- Older adults were slower and less accurate, exhibiting general task difficulties.
- Young adults showed a medial frontal negativity (MFN) modulated by PI levels, suggesting cognitive control.
- Older adults displayed a late positive component (LPC) modulated by PI, possibly indicating conflict detection.
Conclusions:
- Age-related differences in PI resolution are linked to distinct neural signatures (MFN vs. LPC).
- Young adults may employ cognitive control, while older adults might rely on conflict detection mechanisms.
- These findings highlight divergent neural strategies for managing interference in working memory across the lifespan.
