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KMID : 1036820150200030435
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Communication Sciences & Disorders
2015 Volume.20 No. 3 p.435 ~ p.445
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Ratio of Correct Information Unit and Cognitive Functions in Healthy Elderly Adults
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Choi Hyun-Joo
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Abstract
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Objectives: The purpose of the present study was to investigate the relationship between the ratio of Correct Information Unit (CIU) and cognitive functions in healthy elderly adults.
Methods: Sixty healthy elderly people participated in this study. Discourse samples were collected from conversation and two picture description tasks. The cognitive function tests included attention (Digit Span Test), naming (Korean version of Boston Naming Test [K-BNT]), memory (Seoul Verbal Learning Test) and frontal executive functions (Korean version of Color Word Stroop Test, Korean version of Trail Making Test for elderly [K-TMT-e], Korean version of Controlled Oral Word Association Test [K-COWAT]).
Results: The results were as follows. First, there was no significant difference according to gender in the ratio of CIU, but the ratio of CIU in conversation was significantly higher than that of the picture description task. Second, the ratio of CIU in conversation had no significant correlation to age, educational level or Korean Mini Mental Status Examination (K-MMSE) score, but the ratio of CIU in the picture description had a positive correlation to educational level and the K-MMSE score. Third, the ratio of CIU in the picture description had significant correlations to performance on the K-BNT, part B of K-TMT-e, and K-COWAT. Fourth, results of regression analysis indicated that performance on the cognitive function tests used this study were significant predictors for the ratio of CIU.
Conclusion: These results suggest that the ratio of CIU is related to performances on naming and frontal executive functions.
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KEYWORD
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Discourse production, Correct Information Unit, Cognitive function, Healthy elderly
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