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Syllogistic reasoning and cognitive ageing.

John E Fisk1, Charles Sharp

  • 1Centre for Applied Psychology, Liverpool John Moores University, UK. j.e.fisk@livjm.ac.uk

The Quarterly Journal of Experimental Psychology. A, Human Experimental Psychology
|November 8, 2002
PubMed
Summary

Older adults show age-related declines in syllogistic reasoning, potentially linked to factors beyond working memory, such as word fluency. This suggests complex cognitive processes influence aging effects.

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Area of Science:

  • Cognitive Psychology
  • Neuropsychology
  • Gerontology

Background:

  • Age-related cognitive decline affects reasoning abilities.
  • Working memory capacity has been previously linked to syllogistic reasoning deficits in older adults.

Purpose of the Study:

  • To investigate the relationship between age, working memory, and syllogistic reasoning.
  • To explore other cognitive factors that may contribute to age-related reasoning impairments.

Main Methods:

  • Tested 30 older adults (mean age 66) and 34 younger adults (mean age 24) on syllogisms and other cognitive measures.
  • Utilized correlational analyses and statistical controls for covariates like processing speed and word fluency.

Main Results:

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  • Syllogistic reasoning declined with age, but this effect diminished when controlling for processing speed.
  • Word fluency significantly correlated with syllogistic reasoning and re-introduced a significant age effect.
  • Visuo-spatial processing and random letter generation showed near-significant correlations.

    • Conclusions:

    • Age-related deficits in syllogistic reasoning may not solely be due to reduced working memory capacity.
    • Cognitive processes such as word fluency, potentially involving the prefrontal cortex, may also contribute to observed age-related differences in reasoning.