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KMID : 1036820190240030673
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Communication Sciences & Disorders
2019 Volume.24 No. 3 p.673 ~ p.682
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Ability of Sentence Comprehension according to Syntactic Complexity and Speech Rate in Patients with Dementia of Alzheimer’s Type
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Choi Hyun-Joo
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Abstract
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Objectives: The ability of sentence comprehension in patients with dementia of Alzheimer’s type (DAT) is known to be influenced by syntactic complexity, but the effects of slow speech rate are controversial. The purpose of this study was to investigate the difference of sentence comprehension ability according to the syntactic complexity and slow speech rate in healthy elderly adults and patients with DAT.
Methods: Thirty elderly adults and 30 patients with DAT participated in this study. Sentence comprehension ability according to syntactic complexity was evaluated by using a token test, and the speech rate was adjusted to normal speech rate and slow speech rate using the Praat program.
Results: First, DAT patients had lower sentence comprehension than elderly adults in both speech rates. Second, as the syntactic complexity increased, the ability to comprehend sentences decreased in both elderly adults and patients with DAT, and this effect was more prominent in patients with DAT. Third, slow speech rate did not improve sentence comprehension ability in both elderly adults and patients with DAT, and slow speech rate in syntactically complex sentences decreased sentence comprehension ability.
Conclusion: The results of this study confirmed the characteristics of the deficit the according to the syntactic complexity in patients with DAT, and the effect of sentence comprehension ability due to slow speech rate was different according to syntactic complexity.
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KEYWORD
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Syntactic complexity, Speech rate, Sentence comprehension, Dementia of Alzheimer’s type
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