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Influence of processing speed on adult age differences in working memory
1School of Psychology, Georgia Institute of Technology, Atlanta 30332-0170.
Acta Psychologica
|March 1, 1992
Summary
Perceptual comparison speed significantly impacts working memory performance in adults. Faster processing speeds reduce age-related declines in working memory, highlighting the importance of processing efficiency in cognitive aging.
Area of Science:
- Cognitive Psychology
- Neuroscience of Aging
Background:
- Working memory capacity declines with age.
- Perceptual speed also declines with age.
- The relationship between these cognitive functions is not fully understood.
Purpose of the Study:
- To investigate the relationship between working memory and perceptual comparison speed in adults.
- To determine if perceptual speed influences age-related working memory variance.
Main Methods:
- Two studies involving adults aged 18-80.
- Assessment of working memory functioning.
- Measurement of perceptual comparison speed.
- Statistical control for perceptual speed effects.
Main Results:
- Age-related variance in working memory was significantly reduced when perceptual speed was statistically controlled.
- This effect persisted even under self-paced working memory conditions.
- The influence of speed was primarily related to information activation rate, not information loss rate.
Conclusions:
- Perceptual comparison speed is a crucial factor influencing working memory performance across the adult lifespan.
- Cognitive aging models should consider the role of processing speed, particularly information activation.
- Interventions targeting processing speed may benefit working memory in older adults.