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Aging and counting speed: evidence for process-specific slowing

M Sliwinski1

  • 1Saul R. Korey Department of Neurology and Rose F. Kennedy Center for Mental Retardation and Human Development, Albert Einstein College of Medicine, Bronx, New York 10461, USA. sliwinsk@aecom.yu.edu

Psychology and Aging
|March 1, 1997
PubMed
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Cognitive aging affects counting differently. Some counting tasks, like incrementing and enumerating larger sets, show minimal age-related slowing, while others, like subitizing smaller sets, decline with age.

Area of Science:

  • Cognitive Psychology
  • Neuroscience of Aging
  • Human Cognition

Background:

  • Aging is often associated with cognitive decline, particularly in processing speed.
  • However, the impact of aging on specific cognitive functions like numerical processing is not fully understood.
  • Previous research suggests variability in age-related cognitive changes.

Purpose of the Study:

  • To investigate how aging affects different types of counting operations.
  • To determine if all counting processes are equally susceptible to age-related slowing.
  • To identify specific counting functions that are preserved or impaired in older adults.

Main Methods:

  • Assessed performance of adults aged 20-86 on two nonlexical counting tasks.
  • Measured speed and accuracy for incrementing, enumeration (5-8 items), and subitizing (< or = 4 items).

Related Experiment Videos

  • Analyzed age-related effects on different counting processes using distinct mathematical functions.

    • Main Results:

    • Incrementing speed and enumeration speed showed subproportional age effects, indicating resilience to aging.
    • Subitizing frequency and speed decreased with age.
    • Age-related slowing was observed in the initiation of the incrementing process, following a different age-related function.
    • Different counting processes exhibited unique age-related trajectories.

    Conclusions:

    • Cognitive slowing is not uniform across all numerical processing tasks.
    • Certain counting abilities, such as enumerating larger sets, are relatively preserved in aging adults.
    • Specific aspects of counting, like subitizing and process initiation, are more vulnerable to age-related decline.
    • These findings highlight the heterogeneity of cognitive aging in numerical cognition.