title: Electrophysiological indices of phonological impairments in dyslexia.
abstract: OBJECTIVE
  A range of studies have shown difficulties in perceiving acoustic and phonetic information in dyslexia; however, much less is known about how such difficulties relate to the perception of individual words. The authors present data from event-related potentials (ERPs) examining the hypothesis that children with dyslexia have difficulties with processing phonemic information within spoken words compared to age-matched readers with typical development.
  
  
  METHODS
  The authors monitored ERPs to auditory words during a simple picture-word matching task. The key manipulation was the inclusion of both matching stimuli and three types of mismatches (cohort, CONE-comb; rhyme, CONE-bone; and unrelated, CONE-fox).
  
  
  RESULTS
  Children with dyslexia showed atypical N400 ERP waveforms to both types of phonological mismatches, but not to phonologically unrelated mismatches, reflecting a relative insensitivity to phonological overlap among auditory words.
  
  
  CONCLUSIONS
  The data suggest that children with dyslexia have impairments in integrating phonological information into word-level representations. The results suggest that speech perception difficulties in dyslexia might have consequences for processing auditory words.
authors: University of Winnipeg, Manitoba, Canada. a.desroches@uwinnipeg.ca
authors: Amy S
authors: AS
authors: Desroches
authors: Randy Lynn
authors: RL
authors: Newman
authors: Erin K
authors: EK
authors: Robertson
authors: Marc F
authors: MF
authors: Joanisse
mesh_terms: D000161:Acoustic Stimulation / Q000379:methods; D001184:Articulation Disorders / Q000503:physiopathology*; D002648:Child; D004410:Dyslexia / Q000503:physiopathology*; D005072:Evoked Potentials, Auditory / Q000502:physiology*; D005260:Female; D006801:Humans; D007361:Intelligence Tests; D007805:Language Development Disorders / Q000503:physiopathology*; D008297:Male; D010700:Phonetics; D010775:Photic Stimulation / Q000379:methods; D011930:Reaction Time / Q000502:physiology; D013063:Speech Discrimination Tests