Dorothy V. M. Bishop|Mervyn J. Hardiman|J Barry
Auditory Deficit as a Consequence Rather than Endophenotype of Specific Language Impairment: Electrophysiological Evidence
University of Oxford|University of Oxford|University of Oxford
developmental language disorders caused poor auditory discrimination popular theory behavioural evidence inconclusive studied children specific language impairment measuring brains electrophysiological response sounds passive paradigm focused tcomplex eventrelated peak different origins developmental course wellknown vertex responsewe analysed auditory eventrelated potentials tones syllables 16 children 16 adolescents specific language impairment compared 32 typicallydeveloping controls matched gender iq agewe replicated prior findings significant reduction ta amplitude children adolescents specific language impairment particularly marked syllables topography tcomplex syllables indicated less focal response language impairments distinguish causal models considered correlations size ta response measures language literacy parents well children bestfitting model one auditory deficit consequence rather cause difficulties phonological processingthe tcomplex syllables abnormal size topography children specific language impairment likely consequence rather cause difficulties phonological processing