Theories of Dyslexia: Support by Changes in Auditory Perception1

Abstract

This study aims to examine contemporary theories on dyslexia, based on findings related to changes in auditory processing and speech perception found in dyslexics. The support for the phonological, allophonic and auditory deficit theories of dyslexia is discussed based on findings related to these changes in auditory perception. A new theoretical model is proposed, according to which dyslexia is a multifactorial-based deficit, with a gamut of associated behavioral symptoms. The deficit presented by dyslexics is partially linguistic, as advocated by the phonological theory, and partially auditory, as advocated by the theory of auditory deficit. Both factors interact and are inseparable in accounting for the symptomatology observed in reading and writing disorders.