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Influence of task-specific processing speed on age differences in memory

T A Salthouse1, V E Coon

  • 1School of Psychology, Georgia Institute of Technology.

Journal of Gerontology
|September 1, 1993
PubMed
Summary
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Cognitive processing speed significantly impacts memory performance in adults. Slower processing in older adults contributes substantially to age-related memory decline, affecting multiple cognitive functions.

Area of Science:

  • Cognitive Psychology
  • Neuroscience of Aging
  • Human Memory Research

Background:

  • Adult age differences in memory are a significant area of research.
  • The role of processing speed in mediating these age-related memory differences is hypothesized but requires further investigation.

Purpose of the Study:

  • To investigate the specific aspects of processing speed that mediate age differences in memory.
  • To determine if task-specific or general processing speed is more influential in age-related memory decline.

Main Methods:

  • Two studies utilized a serial memory task requiring recall in original or reordered sequences.
  • Statistical controls were applied to task-specific and task-independent measures of processing speed.

Main Results:

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  • Older adults exhibited slower processing durations on the memory task compared to younger adults.
  • Controlling for general processing speed significantly attenuated age-related memory variance, similar to controlling for task-specific speed.

Conclusions:

  • Findings support the hypothesis that reduced cognitive processing speed contributes significantly to age-related memory differences.
  • This decline in speed affects multiple cognitive processes, not limited to one or two specific functions.