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Abstract
The interaction between phonological and morphological breakdown in an agrammatic aphasic was investigated. Three linguistic tasks were constructed which were presented via two modes, reading and repetition. Results revealed that purely phonological consonant clusters were easier than clusters which contain a morphological component, and that these categories could be differentiated in terms of phonological error type. Inflectional omission was conditioned by phonological characteristics of the preceding segment. There was an interaction between the phonological and morphological hierarchies of difficulty in inflections which are homonyms phonologically. Findings suggest an interdependence between phonological and morphological breakdown in the agrammatic aphasic examined. Results were discussed with reference to clinical implications.
Highlights
The interaction between phonological and morphological breakdown in an agrammatic aphasic was investigated
The trend within the psycholinguistic aphasia research has been to focus on the components of language in isolation, rather than to investigate interrelationships between these levels of linguistic breakdown
Results of this study reflect a mutual interdependence between the phonologically and morphologically impaired systems of this agrammatic aphasic patient. Such findings contradict the notions that agrammatism is a uniquely phonological deficit (Kean, 1977) or that it is a disruption of the syntactic component of language co-occurring with an independent disorder of articulation (Berndt and Caramazza, 1981, p. 171)
Summary
The interaction between phonological and morphological breakdown in an agrammatic aphasic was investigated. Findings suggest an interdependence between phonological and morphological breakdown in the agrammatic aphasic examined. OPSOMMING Die interaksie tussen fonologiese en morfologiese uitvalle in 'n agrammatiese afasia pasient is ondersoek. Bevindings dui op 'n interafhanklikheid tussen fonologiese en morfologiese uitvalle in die pasient. The symptomatology of agrammatic aphasics, their tendency to delete inflectional morphemes and their high proportion of phonemic errors, provides a unique opportunity to examine the mutual influence of phonologically i and morphologically impaired systems. De Villiers (1974) contends that explanations such as transformational complexity, semantic complexity, stress, redundancy and frequency of occurrence of each morpheme in normal adult speech are insufficient to explain the hierarchical morphemic impairment This suggests that alternative explanations should be sought
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