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Dyslexia, Learning, and the Brain$
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Roderick Nicolson and Angela Fawcett

Print publication date: 2008

Print ISBN-13: 9780262140997

Published to MIT Press Scholarship Online: August 2013

DOI: 10.7551/mitpress/9780262140997.001.0001

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Theoretical Explanations of Developmental Dyslexia

Theoretical Explanations of Developmental Dyslexia

(p.21) 2 Theoretical Explanations of Developmental Dyslexia
Dyslexia, Learning, and the Brain

Roderick I. Nicolson

Angela J. Fawcett

The MIT Press

This chapter provides a brief overview of the major theories of the underlying causes of developmental dyslexia. First, it presents three cognitive level explanations: the phonological deficit hypothesis, the double-deficit hypothesis, and the automatization deficit hypothesis. It then discusses three brain-level explanatory frameworks, which includes the cerebral cortex hypotheses, the magnocellular deficit hypotheses, and the cerebellar deficit hypothesis. Finally, the chapter presents evidence of genetic transmission of dyslexia.

Keywords:   developmental dyslexia, dyslexia, phonological deficit, double-deficit, automatization deficit, cerebral cortex hypotheses, magnocellular deficit, cerebellar deficit

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