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Decomposing adult age differences in symbol arithmetic

T A Salthouse1, A W Kersten

  • 1School of Psychology, Georgia Institute of Technology, Atlanta 30332-0170.

Memory & Cognition
|September 1, 1993
PubMed
Summary
This summary is machine-generated.

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Cognitive processing speed declines with age, impacting symbol arithmetic performance in older adults. This age-related slowing affects multiple cognitive functions, not just memory or learning.

Area of Science:

  • Cognitive Psychology
  • Neuroscience of Aging
  • Human Factors

Background:

  • Adult age differences in cognitive tasks are well-documented.
  • Symbol arithmetic, a complex cognitive task, is sensitive to age-related changes.
  • Understanding the specific cognitive components affected by aging is crucial.

Purpose of the Study:

  • To identify the specific cognitive components underlying age-related differences in symbol arithmetic.
  • To investigate the role of processing speed, working memory, and associative learning in symbol arithmetic performance across the adult lifespan.

Main Methods:

  • A componential analysis was performed on symbol arithmetic tasks.
  • Measures included substitution of digits for symbols and arithmetic operations on these digits.

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  • Participants (N=104) included young and older adults who also completed tests of working memory, perceptual speed, motor speed, and associative learning.

    • Main Results:

    • Age-related slowing was observed in multiple cognitive processes, consistent with a general decrease in processing speed.
    • Symbol arithmetic performance showed significant age-related variance even after controlling for working memory and associative learning.
    • This suggests that factors beyond working memory and associative learning contribute to age differences in this task.

    Conclusions:

    • The speed of various cognitive processes diminishes with advanced age.
    • General processing speed decline is a primary driver of age-related differences in symbol arithmetic.
    • Alternative hypotheses attributing these differences solely to working memory or associative learning are less supported.