ABSTRACT
ONE EXPLANATION FOR THE effects of brain damage on speech is that it destroys, or isolates, one or more of the components of the system required for intact performance. Such an explanation lacks generality. It does not account for the speech errors of normal speakers and it fails to explain certain phenomena within the clinical literature itself, such as the recovery patterns of two bilingual aphasics recently reported by Paradis et al. (1982). This chapter develops a framework which accommodates the performance of normal as well as braindamaged individuals, and it provides a specific model of the bilingual speaker. The framework and model describe a conceptual nervous system and make no claims as to the nature of the underlying neural mechanism.
