Visual Temporal Processing in Dyslexia and the Magnocellular Deficit Theory: The Need for Speed?
Gregor MT McLean, Geoffrey W Stuart, Veronika Coltheart, Anne Castles
Journal of Experimental Psychology Human Perception & Performance | AMER PSYCHOLOGICAL ASSOC | Published : 2011
A controversial question in reading research is whether dyslexia is associated with impairments in the magnocellular system and, if so, how these low-level visual impairments might affect reading acquisition. This study used a novel chromatic flicker perception task to specifically explore temporal aspects of magnocellular functioning in 40 children with dyslexia and 42 age-matched controls (aged 7-11). The relationship between magnocellular temporal resolution and higher-level aspects of visual temporal processing including inspection time, single and dual-target (attentional blink) RSVP performance, go/no-go reaction time, and rapid naming was also assessed. The Dyslexia group exhibited si..View full abstract