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In summary, phonological analysis of aphasic speech production indicates similar patterns of dissolution for both anterior and posterior aphasics. These errors can be characterized in terms of the frequency of phoneme substitution errors in which the relation between target word and actual production is distinguished primarily by single distinctive feature contrasts, simplification errors in which the complexity of a phonological form is reduced, the occurrence of intrusions of sounds or syllables, and the influence of neighboring sounds on the final speech output.
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