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Activities and Seminars

Usha Goswami, Centre for Neuroscience in Education, University of Cambridge
 
Date: Oct 27, 2011

What: Neural oscillations, phonology and dyslexia: A temporal sampling framework

When: Thursday, October 27th, 1:00pm

Who: Usha Goswami, Centre for Neuroscience in Education, University of Cambridge

Where: BCBL, Paseo Mikeletegi 69, Floor 2.

Summary:

I will provide a brief overview of an oscillatory “temporal sampling” framework that enables diverse data from developmental dyslexia to be drawn into an integrated theoretical framework. The core deficit in dyslexia is phonological. Impaired temporal sampling of speech by neuroelectric oscillations that encode incoming information at lower frequencies (Theta and Delta) may explain the perceptual and phonological difficulties with syllables, rhymes and rhythmic input found in dyslexia. These difficulties may be indexed by a perceptual insensitivity to rise times in the amplitude envelope, a sensory impairment found in developmental dyslexia across languages. The temporal sampling framework proposes that the phonological difficulties in dyslexia originate in syllable parsing rather than phonetic perception, although developmentally syllable-level difficulties will also affect the phonetic level. A conceptual framework based on oscillations that entrain to sensory input also has implications for other sensory theories of dyslexia, offering opportunities for integrating a diverse and confusing experimental literature.