Journal article
Sensitivity to dynamic auditory and visual stimuli predicts nonword reading ability in both dyslexic and normal readers
Current biology, Vol.8(14), pp.791-797
07/02/1998
DOI: 10.1016/s0960-9822(98)70320-3
PMID: 9663387
Abstract
Background: Developmental dyslexia is a specific disorder of reading and spelling that affects 3-9% of school-age children and adults. Contrary to the view that it results solely from deficits in processes specific to linguistic analysis, current research has shown that deficits in more basic auditory or visual skills may contribute to the reading difficulties of dyslexic individuals. These might also have a crucial role in the development of normal reading skills. Evidence for visual deficits in dyslexia is usually found only with dynamic and not static stimuli, implicating the magnocellular pathway or dorsal visual stream as the cellular locus responsible. Studies of such a dissociation between the processing of dynamic and static auditory stimuli have not been reported previously. Results: We show that dyslexic individuals are less sensitive both to particular rates of auditory frequency modulation (2 Hz and 40 Hz but not 240 Hz) and to dynamic visual-motion stimuli. There were high correlations, for both dyslexic and normal readers, between their sensitivity to the dynamic auditory and visual stimuli. Nonword reading, a measure of phonological awareness believed crucial to reading development, was also found to be related to these sensory measures. Conclusions: These results further implicate neuronal mechanisms that are specialised for detecting stimulus timing and change as being dysfunctional in many dyslexic individuals. The dissociation observed in the performance of dyslexic individuals on different auditory tasks suggests a sub-modality division similar to that already described in the visual system. These dynamic tests may provide a non-linguistic means of identifying children at risk of reading failure.
Details
- Title: Subtitle
- Sensitivity to dynamic auditory and visual stimuli predicts nonword reading ability in both dyslexic and normal readers
- Creators
- C Witton - Newcastle UniversityJ Talcott - University of OxfordP Hansen - University of OxfordA Richardson - University of OxfordT Griffiths - Newcastle UniversityA Rees - Newcastle UniversityJ Stein - University of OxfordGGR Green
- Resource Type
- Journal article
- Publication Details
- Current biology, Vol.8(14), pp.791-797
- DOI
- 10.1016/s0960-9822(98)70320-3
- PMID
- 9663387
- ISSN
- 0960-9822
- eISSN
- 1879-0445
- Language
- English
- Date published
- 07/02/1998
- Academic Unit
- Psychological and Brain Sciences
- Record Identifier
- 9984627197602771
Metrics
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