Rate of information segregation in developmentally dyslexic children

Brain Lang. 2000 Oct 15;75(1):66-81. doi: 10.1006/brln.2000.2326.

Abstract

Slowed processing of sequential perceptual information is related to developmental dyslexia. We investigated this unimodally and crossmodally in developmentally dyslexic children and controls ages 8-12 years. The participants judged whether two spatially separate trains of brief stimuli, presented at various stimulus onset asynchronies (SOA) in one or two senses, were synchronous or not. The stimulus trains consisted of light flashes in vision, clicks in audition, and indentations of the skin in the tactile sense. The dyslexic readers required longer SOAs than controls for successful performance in all six comparisons. The crossmodal spatiotemporal resolution of the groups differed more than unimodal performance. The dyslexic readers' segregation performance was also less differentiated than that of the controls. Our results show that not only sensory but also polysensory nonverbal information processing is temporally impaired in dyslexic children.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Auditory Perceptual Disorders / diagnosis
  • Child
  • Discrimination Learning
  • Dyslexia / diagnosis*
  • Female
  • Humans
  • Male
  • Neuropsychological Tests
  • Perceptual Disorders / diagnosis*
  • Reaction Time*
  • Reference Values
  • Sensory Thresholds
  • Speech Perception
  • Touch