... developing systems. A developmental disorder of cognition applies when an individual has not been able to acquire a cognitive ability to a normal degree. Investigating people with either acquired or developmental disorders of cognition can be used to support or challenge theories about cognition and also to contrast developmental models. The aim of cognitive neuropsychology when applied to children is to develop a model of cognition, whereby all childhood cases of disorders (within that domain) can be explained (Bara, B. 1995). To explain the cognitive neuropsychological approach to developmental disorders, the assumptions and fundamental beliefs of the approach will be discussed. By studying brain-damaged individuals to gain an understanding of how the normal brain processes information, cognitive neuropsychology is making three assumptions (Margolin, D, I. 1992). Firstly, that information processing modules can function independently (Morton, J. 1981 cited in Margolin, D, I. 1992), Secondly, that brain damage can impair modules ...

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