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Cognitive development continues throughout adulthood, undergoing significant shifts across early, middle, and late stages. Individual transition occurs from adolescent idealism to pragmatic and adaptable thinking in early adulthood. During this period, individuals learn to integrate personal beliefs with the recognition that other perspectives are equally valid. Exposure to the complexities of modern society, diverse experiences, and higher education contribute to this adaptive thought process,...
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An Experimental Paradigm for Measuring the Effects of Ageing on Sentence Processing
04:30

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Why do older adults have difficulty with semantic fluency?

Jean K Gordon1, Megan Young1, Carly Garcia1

  • 1a Communication Sciences & Disorders , University of Iowa , Iowa City , IA , USA.

Neuropsychology, Development, and Cognition. Section B, Aging, Neuropsychology and Cognition
|September 8, 2017
PubMed
Summary
This summary is machine-generated.

Older adults experience slower word retrieval, impacting semantic fluency more than letter fluency. This occurs because semantic fluency relies on processing speed and visualization, which decline with age, unlike letter fluency, which benefits from preserved vocabulary.

Keywords:
Aginglexical accessverbal fluencyvocabularyword retrieval

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Area of Science:

  • Cognitive Neuroscience
  • Psycholinguistics
  • Aging Research

Background:

  • Aging is associated with cognitive decline, especially in fluid intelligence, while crystallized intelligence remains relatively intact.
  • This pattern is observed in language, where lexical retrieval slows, but vocabulary knowledge is maintained.
  • Verbal fluency tasks, including semantic and letter fluency, are used to assess these cognitive and linguistic changes.

Purpose of the Study:

  • To investigate the factors contributing to the observed asymmetry in age-related declines in semantic and letter fluency.
  • To understand the underlying cognitive mechanisms driving these differences in verbal fluency performance in aging adults.

Main Methods:

  • Examined verbal fluency in 86 adults aged 30-89 years.
  • Utilized multiple regression analyses to identify predictors of semantic and letter fluency performance.
  • Assessed the relationship between performance and age-related cognitive changes.

Main Results:

  • Semantic fluency performance was significantly predicted by lexical retrieval speed and visualization strategies.
  • Letter fluency performance was primarily predicted by vocabulary knowledge.
  • Age-related declines disproportionately affected semantic fluency due to its reliance on processing speed and visualization.

Conclusions:

  • Semantic fluency decline in aging is linked to reduced lexical retrieval speed and visualization abilities.
  • Letter fluency is more resilient to aging due to its strong dependence on preserved vocabulary knowledge.
  • These findings elucidate the mechanisms behind age-related word retrieval difficulties and highlight the differential impact of aging on distinct verbal fluency components.