Speed of lower-level auditory and visual processing as a basic factor in dyslexia: Electrophysiological evidence

摘要: This study investigated speed of processing (SOP) among college-level adult dyslexic and normal readers in nonlinguistic sublexical linguistic auditory visual oddball tasks, a cross-modal choice reaction task. Behavioral electrophysiological (ERP) measures were obtained. The results revealed that between both groups, times (RT) longer the latencies P2 P3 components occurred later as compared to tasks. RT ERP longest delayed across On group differences brain activity observed only when responding low-probability targets. These largest for component, most pronounced case phonemes. gap versus modalities each component was larger readers, particularly evident at level. A hypothesis is proposed suggests an amodal, basic SOP deficit readers. slower attributed information general disproportionate "asynchrony" system. It suggested excessive asynchrony two systems may be one underlying causes dyslexics' impaired reading skills.