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Are old adults just like low working memory young adults? Filtering efficiency and age differences in visual working
Kerstin Jost1, Richard L Bryck, Edward K Vogel
1Institute of Psychology, RWTH Aachen University, D-52066 Aachen, Germany. Kerstin.Jost@psych.rwth-aachen.de
Cerebral Cortex (New York, N.Y. : 1991)
|October 2, 2010
Summary
Older adults show delayed filtering of irrelevant information, impacting working memory. This age-related difference in filtering efficiency differs from individual variations seen in younger adults.
Area of Science:
- Cognitive Neuroscience
- Human Aging Research
Background:
- Working memory capacity declines with age, but the underlying functional mechanisms remain unclear.
- Efficient filtering of irrelevant information is crucial for individual differences in visual working memory.
Purpose of the Study:
- To investigate the role of filtering efficiency in age-related working memory decline.
- To compare age-related filtering differences with age-independent individual differences.
Main Methods:
- A change-detection task was administered to young and old participants.
- Irrelevant items were included in the encoding display.
- Contralateral delay activity (EEG) measured filtering efficiency.
Main Results:
- Older adults exhibited reduced filtering scores early in the retention interval compared to young adults.
- This suggests a delay in efficient filtering for older individuals.
- Age-independent filtering differences were more prominent later in the retention interval.
Conclusions:
- Age-related filtering deficits manifest differently than individual differences in filtering efficiency.
- Older adults' working memory decline is not solely attributable to reduced filtering efficiency akin to less efficient young adults.
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