University of Hertfordshire

Multisensory integration and attention in developmental dyslexia

Research output: Book/ReportOther report

  • Vanessa Harrar
  • Jonathan Tammam
  • Alex Perez-Bellido
  • Anna Pitt
  • John Stein
  • Charles Spence
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Original languageEnglish
Place of PublicationBerlin
PublisherElsevier
Number of pages5
Volume24
Edition5
DOIs
Publication statusPublished - 13 Feb 2014

Publication series

NameCurrent Biology
PublisherCell Press

Abstract

Developmental dyslexia affects 5%-10% of the population, resulting in poor spelling and reading skills. While there are well-documented differences in the way dyslexics process low-level visual and auditory stimuli, it is mostly unknown whether there are similar differences in audiovisual multisensory processes. Here, we investigated audiovisual integration using the redundant target effect (RTE) paradigm. Some conditions demonstrating audiovisual integration appear to depend upon magnocellular pathways, and dyslexia has been associated with deficits in this pathway; so, we postulated that developmental dyslexics ("dyslexics" hereafter) would show differences in audiovisual integration compared with controls. Reaction times (RTs) to multisensory stimuli were compared with predictions from Miller's race model. Dyslexics showed difficulty shifting their attention between modalities; but such "sluggish attention shifting" (SAS) appeared only when dyslexics shifted their attention from the visual to the auditory modality. These results suggest that dyslexics distribute their crossmodal attention resources differently from controls, causing different patterns in multisensory responses compared to controls. From this, we propose that dyslexia training programs should take into account the asymmetric shifts of crossmodal attention.

Notes

Vanessa Harrar, et al, 'Multisensory Integration and Attention in Developmental Dyslexia', Current Biology, Vol. 24 (5): 531-535, March 2014, doi: https://doi.org/10.1016/j.cub.2014.01.029. Copyright © 2014 Elsevier Ltd. All rights reserved.

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