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KMID : 0921420090140040470
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Korean Journal of Communication Disorders
2009 Volume.14 No. 4 p.470 ~ p.483
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Patterns of Word Class Production between Picture Description and Narrative Tasks in Aphasia
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Lee Seung-Jin
Kim Hyang-Hee
Seo Sang-Kyu
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Abstract
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Background & Objectives: Impairment in word production during spontaneous speech is considered to be one of the most distinguishable characteristics of aphasic speech production and has been shown to depend on the unique characteristics of each patient’s language and tasks. This study investigates whether aphasic patients with a wide range in fluency levels are divergent inthe Korean word class production proportions during spontaneous speech.
Methods: Spontaneous speech samples using the picture description task and narrative task of the Korean traditional fairy tale, ‘Heungbu and Nolbu,’ were elicited and analyzed using nine Korean word classes, three sentence components, and nineerror types. The proportions of frequencies and errors of each word class were compared between and within the two subject groups: 55 Korean patients with aphasia and 25 normal Korean adult controls. Patients were divided into three subgroups based on their fluency levels measured by syllables per utterance during the picture description task.
Results: The most frequently produced 3-word classes were noun, verb, and postposition in both tasks. However, error patterns were divergent among the groups in that the non-fluent aphasics produced significantly higher error proportions in nouns, verbs and prepositions, as compared to the control subjects. The common error types in both tasks were phonemic paraphasias and substitutions.
Discussion & Conclusion: Narrative tasks may be used in clinical settings as a supplementation of the picture description task in order to assess aphasic patients’ spontaneous speech. In further studies, error patterns in various types of narrative tasks or other quantitative indices, such as mean length of utterance, should be examined.
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KEYWORD
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aphasia, spontaneous speech, picture description task, narrative task, fluency, frequency, word class, error pattern
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