Wide and diffuse perceptual modes characterize dyslexies in vision and audition

Gadi Geiger, Carmen Cattaneo, Raffaella Gallig, Uberto Pozzoli, Maria Luisa Lorusso, Andrea Facoetti, Massimo Molteni

Research output: Contribution to journalArticlepeer-review

Abstract

We examined the performance of dyslexic and typically reading children on two analogous recognition tasks: one visual and the other auditory. Both tasks required recognition of centrally and peripherally presented stimuli. Dyslexies recognized letters visually farther in the periphery and more diffuse near the center than typical readers did. Both groups performed comparably in recognizing centrally spoken stimuli presented without peripheral interference, but in the presence of a surrounding speech mask (the 'cocktail-party effect') dyslexics recognized the central stimuli significantly less well than typical readers. However, dyslexics had a higher ratio of the number of words recognized from the surrounding speech mask, relative to the ones from the center, than typical readers did. We suggest that the evidence of wide visual and auditory perceptual modes in dyslexics indicates wider multi-dimensional neural tuning of sensory processing interacting with wider spatial attention.

Original languageEnglish
Pages (from-to)1745-1764
Number of pages20
JournalPerception
Volume37
Issue number11
DOIs
Publication statusPublished - 2008

ASJC Scopus subject areas

  • Experimental and Cognitive Psychology
  • Artificial Intelligence
  • Sensory Systems

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