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  • Title: Visual deficits in developmental dyslexia: relationships between non-linguistic visual tasks and their contribution to components of reading.
    Author: Jones MW, Branigan HP, Kelly ML.
    Journal: Dyslexia; 2008 May; 14(2):95-115. PubMed ID: 17874457.
    Abstract:
    Developmental dyslexia is often characterized by a visual deficit, but the nature of this impairment and how it relates to reading ability is disputed (Brain 2003; 126: 841-865). In order to investigate this issue, we compared groups of adults with and without dyslexia on the Ternus, visual-search and symbols tasks. Dyslexic readers yielded more errors on the visual-search and symbols tasks compared with non-dyslexic readers. A positive correlation between visual-search and symbols task performance suggests a common mechanism shared by these tasks. Performance on the visual-search and symbols tasks also correlated with non-word reading and rapid automatized naming measures, and visual search contributed independent variance to non-word reading. The Ternus task did not discriminate reading groups nor contributed significant variance to reading measures. We consider how visual-attention processes might underlie specific component reading measures.
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