ON THE NATURE OF THE PHONOLOGICAL OUTPUT PLANNING PROCESSES INVOLVED IN VERBAL REHEARSAL - EVIDENCE FROM APHASIA

This paper describes the performance of an aphasic patient, R.W., in p roducing the sounds of words and in verbal rehearsal. R.W. showed evid ence of retained abilities to access aspects of the forms of spoken wo rds but made numerous phonemic paraphasias in single word production t asks. He did not show features of dysarthria or apraxia of speech. Thi s pattern indicates that his deficit affected a process that plans the phonological forms of spoken words. R.W.'s performances in short-term memory and metalinguistic tasks involving single words were consisten t with impaired rehearsal functions. The pattern of results indicates that rehearsal requires planning of the phonological forms of spoken i tems and suggests that activating entries in the phonological output l exicon is not adequate to permit rehearsal to proceed normally. (C) 19 95 Academic Press, Inc.