Abstract
Livingstone et al. presented evidence for a defect of the magnocellular visual processing stream in developmental dyslexia. They reported diminished visual evoked potentials (VEP) to low-contrast, rapid checkerboard reversal patterns in the dyslexics. We attempted to replicate this effect using transient and steady-state VEPs to checkerboard reversal stimuli in a group of adult developmental dyslexics. Several different reversal rates and contrast levels were utilized. No differences were found between the dyslexic and control groups for the low-contrast, rapidly reversing patterns, nor for any combination of stimulus rate or contrast that was tested. Thus, these findings do not support a magnocellular processing deficit in developmental dyslexia.
Original language | English (US) |
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Pages (from-to) | 1123-1127 |
Number of pages | 5 |
Journal | Neuropsychologia |
Volume | 34 |
Issue number | 11 |
DOIs | |
State | Published - Nov 1996 |
Keywords
- Developmental dyslexia
- Human
- Magnocellular pathway
- Visual evoked potentials (VEP)
ASJC Scopus subject areas
- Behavioral Neuroscience
- Neuropsychology and Physiological Psychology