Asynchrony of visual-orthographic and auditory-phonological word recognition processes: An underlying factor in dyslexia

Asynchrony of visual-orthographic and auditory-phonological word recognition processes: An... This study investigated whether asynchrony ofspeed of processing (SOP) betweenvisual-orthographic and auditory-phonologicalmodalities can account for word recognitiondeficits among dyslexic readers. SOP amongelementary school dyslexic readers was comparedto that of chronologically age-matched normalreaders. SOP was assessed using nonlinguisticand linguistic auditory and visual low-leveltasks and higher-level orthographic andphonological tasks. Behavioral andelectrophysiological (ERP) measures of SOP wereobtained. Data indicated that dyslexic readerswere significantly slower than control readersin most of the experimental tasks. Moreover,dyslexics revealed a systematic SOP gap betweenthe auditory-phonological and thevisual-orthographic modalities. This gap wasfound in both P200 and P300 latencies, andexplained most of the variance in wordrecognition. A theory is proposed suggestingthat asynchrony between the processing rates ofthe visual and the auditory modalities may bean underlying cause of dyslexia. Reading and Writing Springer Journals

Asynchrony of visual-orthographic and auditory-phonological word recognition processes: An underlying factor in dyslexia

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Kluwer Academic Publishers
Copyright © 2002 by Kluwer Academic Publishers
Linguistics; Language and Literature; Psycholinguistics; Education, general; Neurology; Literacy
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