Developmental dyslexia: A condensed review of literature

In this article we provide a condensed review of literature on developmental dyslexia. Starting with the historical background to this language-based reading disorder, we discuss four key components for a valid and operational deinition of developmental dyslexia. We then present the major theoretical explanations of developmental dyslexia in order to gain a better understanding of the causes of this reading disorder. hese causal explanations are addressed in the context of Morton and Frith's (1995) model. Four major theories of developmental dyslexia are discussed: the phonological deicit theory, the double-deicit theory, the magnocellular theory, and the cerebellar theory. he last section of this review addresses the model of reading development proposed by Frith (1986). Understanding the developmental progression of children's abilities in reading is crucial in order to detect in which phase of this progression a breakdown attributed to dyslexia occurs.