Recovery mechanism of naming task was investigated based on the view that recovery process are not uniform across different modalities of language therapy, and that therapy must be planned according to the mechanism of each disorder. Three kind of naming training, namely, the first with Kanji writing, the second with initial syllable cue and repetition, and the third with Kana writing, were administered to 2 aphasics suffering from severe naming disability for more than a year.
The rate of improvement and the stability of their performance was then compared. The better result was obtained in the order of training with Kanji writing, training with Kana writing and training with repetition, in both the improvement rate and the stability of performance. These results can be understood in terms of the dual code theory in which the phonological processes and the visual semantic processes run parallel to each other.
Thus the effectiveness of such training as Kanji writing which activates the visual semantic processes suggests the trouble in the phono-logical processes. Kana writing, normally processed phonologically, is also thought to be processed visuo-semantically in these cases. Repetative naming training was not succesful, that is, the phonological processes were not activated in spite of the stimulation, suggesting that the direct stimulation of the processes with severe disorders may not be so effective. The recovery mechanism in these 2 cases can be viewed in the framework of functional reorganization theory.
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