PubMed · 16796297
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James Jerger. 2006. Auditory processing disorders in children.. https://pubmed.ncbi.nlm.nih.gov/16796297/
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BACKGROUND: Disorders in auditory processing have gained importance over the past 10 years. A first consensus statement defined this disorder and described several of its features. At the present stage of research, tests are missing to discriminate between normal and disturbed auditory processing development. MATERIAL AND METHODS: A total of 142 children from the second and third grades (105 control group, 37 patients) were examined for audiological, auditory and cognitive development, as well as speech and writing abilities. RESULTS: For the first time, normative data were defined for children from 8-9 years of age, and characteristic aspects of auditory processing disorder (APD) could be quantified. CONCLUSION: This study supplies a test-battery with important elements for diagnosing APD under defined conditions.
Although it is commonly accepted that dyslexic children have auditory phonological deficits, the precise nature of these deficits remains unclear. This study examines potential pitch processing deficit in dyslexic children, and recovery after specific training, by measuring event-related brain potentials (ERPs) and behavioural responses to pitch manipulations within natural speech. In two experimental sessions, separated by 6 weeks of training, 10 dyslexic children, aged 9-12, were compared to reading age-matched controls, using sentences from children's books. The pitch of the sentence's final words was parametrically manipulated (either congruous, weakly or strongly incongruous). While dyslexics followed a training focused on phonological awareness and grapheme-to-phoneme conversion, controls followed a non-auditory training. Before training, controls outperformed dyslexic children in the detection of the strong pitch incongruity. Moreover, while strong pitch incongruities were associated with increased late positivity (P300 component) in controls, no such pattern was found in dyslexics. Most importantly, pitch discrimination performance was significantly improved, and the amplitude of the late positivity to the strong pitch incongruity enhanced, for dyslexics after a relatively brief period of training, so that their pattern of response more closely resemble those of controls.
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