Showing papers by "Tim Shallice published in 1979"

Semantic access dyslexia

Abstract: An analytical investigation of the residual reading capacities of a single patient with dyslexia without dysgraphia is reported. Both his ability to name and to comprehend letters and words were severely impaired. The major finding of this investigation was AR's striking capacity for categorizing words he could not read. In addition there was evidence of semantic priming effects. Thus AR was frequently able to achieve partial comprehension of words he could not read. The orthodox interpretation of the dyslexia without dysgraphia in terms of a disconnection syndrome is shown to be inappropriate, at least for the present case, where the deficit appears to be within the semantic domain; it is argued that this type of dyslexia is due to an impairment in accessing semantic information.

Case study approach in neuropsychological research

Abstract: The contribution of the neurological case study approach for establishing the functional organisation of cognitive subsystems is assessed. A number of potential problems are considered, including “resource artefacts”, the nature of the lengthy clinical/experimental procedure used, statistical selection artefacts, reorganisation of function, atypical lateralisation, and the existence of associated deficits. It is argued that, despite these problems, the case study approach is the most promising neuropsychological technique for providing information on the functional organisation of cognitive subsystems.