Sylviane Valdois* April 23th 3.30 pm
*S. Valdois (DR CNRS) Laboratoire de Psychologie et NeuroCognition (UMR5105) Grenoble
Titre : VA span deficit and developmental dyslexia : A causal relationship
Abstract: In her opinion paper and against our causal interpretation, Goswami (Nature Reviews Neuroscience, Nov. 2014) claims that impaired VA span in developmental dyslexia (DD) results from the poor reading experience of dyslexic children. In our response (Lobier & Valdois, mars 2015, Nature Reviews Neuroscience), we argue against this interpretation. In her reply, Goswami claims that strong evidence is missing showing that the VA span deficit is visually driven and an independent cause of dyslexia. In my talk, I will provide evidence that the VA span deficit in DD cannot be interpreted as just the consequence of the child poor reading experience. Indeed, there is evidence that dyslexic children have poorer VA span than younger children of the same reading level, that they are similarly impaired using either verbal or non verbal material, and that dyslexic children with similar reading levels may show either preserved or impaired VA span. Additional findings will be reported showing that the VA span is visually driven. I will further review the challenges in establishing causality listed by Usha Goswami and provide new findings in support of the causal interpretation.
Goswami, U. (2014). Sensory theories of developmental dyslexia : three challenges for research. /Nature Rev. Neurosci., /16, 43-54.
Lobier, M. & Valdois, S. (2015). Visual attention deficits in developmental dyslexia cannot be ascribed solely to poor reading experience./Nature Rev. Neurosci./ . http://dx.doi.org/10.1038/nrn3836-cl
Goswami, U. (2015). Visual attention span deficits and assessing causality in developmental dyslexia. /Nature Rev. Neurosci/. http://dx.doi.org/10.1038/nrn3836-cl
Invitée par Laure Pisella