The influence of phonological context on the sound errors of a speaker with Wernicke's aphasia.
A corpus of phonological errors produced in narrative speech by a Wernicke's aphasic speaker (R.W.B.) was tested for context effects using two new methods for establishing chance baselines. A reliable anticipatory effect was found using the second method, which estimated chance from the distance between phoneme repeats in the speech sample containing the errors. Relative to this baseline, error-source distances were shorter than expected for anticipations, but not perseverations. R.W.B.'s anticipation/perseveration ratio measured intermediate between a nonaphasic error corpus and that of a more severe aphasic speaker (both reported in Schwartz et al., 1994), supporting the view that the anticipatory bias correlates to severity. Finally, R.W.B's anticipations favored word-initial segments, although errors and sources did not consistently share word or syllable position.
Goldmann
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Moss Rehabilitation Research Institute, 1200 West Tabor Rd., Philadelphia, PA 19141, USA.
Schwartz
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Wilshire
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D001041:Aphasia, Wernicke / Q000175:diagnosis*; D002543:Cerebral Hemorrhage / Q000175:diagnosis; D006801:Humans; D008297:Male; D008875:Middle Aged; D009483:Neuropsychological Tests; D010296:Parietal Lobe / Q000000981:diagnostic imaging; D010700:Phonetics; D013702:Temporal Lobe / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed