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Theories of developmental dyslexia: Insights from a multiple case study of dyslexic adults
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The relationship between motor control and phonology in dyslexic children [<Journal>]
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Abstract:
Background: The goal of this study was to investigate the automaticity/cerebellar theory of dyslexia. We tested phonological skills and cerebellar function in a group of dyslexic 8-12 year old children and their matched controls. Tests administered included the Phonological Assessment Battery, postural stability, bead threading, finger to thumb and time estimation. Results: Dyslexic children were found to be significantly poorer than the controls at all tasks but time estimation. About 75% of dyslexics were more than one standard deviation below controls in phonological ability, and 50% were similarly impaired in motor skills. However, at least part of the discrepancy in motor skills was due to dyslexic individuals who had additional disorders (ADHD and/or DCD). The absence of evidence for a time estimation deficit also casts doubt on the cerebellar origin of the motor deficiency. About half the dyslexic children didn't have any motor problem, and there was no evidence for a causal relationship between motor skills on the one hand and phonological and reading skills on the other. Conclusion: This study provides partial support for the presence of motor problems in dyslexic children, but does not support the hypothesis that a cerebellar dysfunction is the cause of their phonological and reading impairment.
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Keyword:
Behavioral Neuroscience; Clinical Psychology; Developmental Psychology; Neuropsychology
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URL: http://cogprints.org/2349/
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Left posterior BA37 is involved in object recognition: a TMS study
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Understanding other minds : perspectives from developmental cognitive neuroscience
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Abnormal functional activation during a simple word repetition task: a PET study of adult dyslexics
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