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Related Experiment Videos

Word-finding ability and design fluency in developmental dyslexia.

P Griffiths1

  • 1Department of Psychology, University of Stirling, Scotland, UK.

The British Journal of Clinical Psychology
|February 1, 1991
PubMed
Summary
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Developmental dyslexia impacts word retrieval, particularly at the word form level, but not semantic processing or non-verbal fluency. These findings suggest long-term memory deficits in dyslexia.

Area of Science:

  • Neuroscience
  • Developmental Psychology
  • Linguistics

Background:

  • Developmental dyslexia is associated with oral and visual language disorders.
  • Previous research indicates word-finding difficulties in children with dyslexia, but causality and specificity remain unclear.

Purpose of the Study:

  • To investigate verbal and non-verbal fluency in individuals with dyslexia.
  • To determine the specificity of word-finding difficulties in dyslexia at different linguistic levels (word form vs. semantic).

Main Methods:

  • Assessed verbal fluency using cued lexical retrieval tasks.
  • Measured non-verbal fluency through stick design tasks.
  • Compared dyslexic individuals with age- and reading-level-matched controls.

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Main Results:

  • Difficulties in dyslexia were specifically observed at the word form level of lexical access.
  • Individuals with dyslexia demonstrated superior word finding at the semantic level.
  • Non-verbal (design) fluency was comparable between dyslexic and control groups.

Conclusions:

  • Findings suggest that dyslexia primarily involves long-term linguistic memory processes affecting word form access.
  • Results align with neurocognitive models implicating diffuse left hemisphere dysfunction in dyslexia.