Visual evoked potentials in dyslexics and normals: Failure to find a difference in transient or steady-state responses
- 1 September 1993
- journal article
- research article
- Published by Cambridge University Press (CUP) in Visual Neuroscience
- Vol. 10 (5), 939-946
- https://doi.org/10.1017/s0952523800006155
Abstract
We measured transient and steady-state checkerboard contrast-reversal visual evoked potentials (VEPs) in ten dyslexics, five patient controls, and 11 normals over a range of contrasts and luminances. Latency, amplitude, and phase measurements failed to distinguish the responses of dyslexics from those of normals or patient controls. Decreases in luminance or contrast resulted in an increased latency of the transient VEP in all groups, but these changes also did not distinguish the responses of dyslexics from those of the controls. Response variability was similar in dyslexics and normals, but was increased in subjects with attention deficit-hyperactivity disorder (ADHD). Performance on standardized psychometric testing did differentiate the dyslexics from controls, but did not correlate with VEP responses.Keywords
This publication has 1 reference indexed in Scilit:
- VISUAL PROCESSING DEFICITS IN DYSLEXIA: RECEPTORS OR NEURAL MECHANISMS?Perceptual and Motor Skills, 1992