![]() Abnormal MMNm responses were recorded in response to frequency deviant stimuli in the dyslexic group. However, there was no evidence that manipulating either the silent interval or the frequency separation between the tones had a greater detrimental effect on dyslexic participants specifically. The amplitude of N1m responses to tone pair stimuli were reduced in the dyslexic group. Results confirm that low-level auditory processing deficits are present in compensated dyslexic adults. Magnetoencephalographic recordings were conducted during processing of simple, non-speech, auditory stimuli. ![]() The dyslexic group were impaired, relative to the control group, on measures of literacy, phonological awareness, working memory and processing speed. The participant pool consisted of seven compensated dyslexic adults and seven age and IQ matched controls. Group comparisons are supported by analysis of individual data in order to address the issue of heterogeneity in dyslexia. Using psychometric and neurophysiological measures, the nature of auditory processing abnormalities is investigated. ![]() This thesis aims to determine whether the low-level (pre-attentive) processing of simple auditory stimuli is disrupted in compensated adult dyslexics. ![]() However, many behavioural correlates of dyslexia cannot be explained sufficiently by cognitive-level accounts and there is anatomical, psychometric and physiological evidence of sensory deficits in the dyslexic population. Opponents of such sensory-based explanations argue that dyslexia arises primarily from phonological impairments. AbstractThe possibility that developmental dyslexia results from low-level sensory processing deficits has received renewed interest in recent years. ![]()
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