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This approach is often advocated (e.g. Howard & Patterson, 1989; Mitchum & Berndt, 1990), but there are as yet few actual examples of it in the literature. Thus Coltheart and Byng´s (1989) study is cognitive neuropsychological rehabilitation at its (existing) best. Even better (though, at least to my knowledge, not presently existing) would be the following strategy: having hypothesised that surface dyslexia can arise from deficits at each of three ´locations´, Coltheart and Byng might have specified what treatment technique would be most appropriate to each of the three alternatives. Then, despite their conclusion that E.E.´s deficit was at the level of word recognition, they might have treated him (with three different sets of materials) using each of these techniques.
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