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http://dx.doi.org/10.14400/JDC.2019.17.2.283

The Characteristics of semantic association task performance in elderly with subjective memory impairment and mild cognitive impairment  

Kang, Seo-Jeong (Dept. of Speech Pathology, Daegu University)
Park, Seong-Hyeon (Dept. of Rehabilitation Industry, Daegu University)
Kim, Jung-Wan (Dept. of Speech Pathology, Daegu University)
Publication Information
Journal of Digital Convergence / v.17, no.2, 2019 , pp. 283-292 More about this Journal
Abstract
The loss of semantic knowledge and impairments in semantic associations by semantic category is gaining increasing attention, as indicators of early-stage cognitive decline. As such, we assigned semantic association task (SAT) to normal elderly (NE) and those with subjective memory impairment (SMI) or mild cognitive impairment (MCI) to examine their performance by semantic subcategories and the differences in error patterns. We found a significant difference in the number of correct response and reaction time under the SAT categories among the three groups, with the highest performance observed in 'function' and the lowest performance in 'superordinate' and 'part/whole'. Moreover, the error frequency was the lowest in NE, followed by those with SMI and MCI, with the latter two groups showing a significant increase in no-response. Our findings demonstrate the varying extent and process of impairments in the semantic network by category over different stages of cognitive decline. Thus, we proposed SAT performance as an indicator to detect and follow-up on cognitive decline in elderly with cognitive disorder.
Keywords
Mild Cognitive Impairment; Subjective Memory Impairment; Cognitive Disorder; Semantic Knowledge; Rehabilitation;
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