Global and local pitch perception in children with developmental dyslexia |
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Authors: | Ziegler Johannes C Pech-Georgel Catherine George Florence Foxton Jessica M |
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Affiliation: | a Psychology Department, Aix-Marseille Université, Marseille, France b Laboratoire de Psychologie Cognitive, Centre National de la Recherche Scientifique, Marseille, France c Centre de Référence pour les Troubles des Apprentissages, Centre Hospitalier Universitaire La Timone, Marseille, France d Centre de Recherche Cerveau & Cognition, Centre National de la Recherche Scientifique, Toulouse, France |
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Abstract: | This study investigated global versus local pitch pattern perception in children with dyslexia aged between 8 and 11 years. Children listened to two consecutive 4-tone pitch sequences while performing a same/different task. On the different trials, sequences either preserved the contour (local condition) or they violated the contour (global condition). Compared to normally developing children, dyslexics showed robust pitch perception deficits in the local but not the global condition. This finding was replicated in a simple pitch direction task, which minimizes sequencing and short term memory. Results are consistent with a left-hemisphere deficit in dyslexia because local pitch changes are supposedly processed by the left hemisphere, whereas global pitch changes are processed by the right hemisphere. The present data suggest a link between impaired pitch processing and abnormal phonological development in children with dyslexia, which makes pitch pattern processing a potent tool for early diagnosis and remediation of dyslexia. |
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Keywords: | Developmental dyslexia Global Local Pitch perception Music |
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