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How the difference of working memory capacities influences both the auditory-language processing and the cerebral laterality in the processing: A study of dichotic listening test under the dual task of shadowing and name identification Mimpei Kawamura 1,2 , Shu Morioka 1 1Graduate School of Health Science, Kio University 2Department of Rehabilitation, Speech-Language-Hearing Therapy, Fukui College of Health Science Keyword: ワーキングメモリ容量 , 両耳分離聴検査 , 右耳優位性 , ラテラリティ , 音声言語処理 , working memory capacity , dichotic listening test , right ear advantage , laterality , auditory-language processing pp.13-21
Published Date 2012/3/15
DOI https://doi.org/10.11477/mf.6001100310
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 By using a dichotic listening test for 17 normal adults with right-handedness as its subjects, this study examines how the difference of working memory capacities(WMC) influences both the auditory-language processing and the cerebral laterality in processing. The test introduces the dual task by simultaneously presenting different rows of words to each ear, and while asking the subjects to repeat the row of words in one ear, they are to identify their name embedded in the other row of words in the other ear. Meaningful and meaningless syllable tasks were used, and each task asks the subjects to repeat the words presented to the right ear first and then those presented to the left ear. Right ear advantage(REA) was found in both High-Span and Low-Span subjects. Moreover, REA was greater for the meaningful syllables tasks than for the meaningless ones. Although not a significant difference, High-Span subjects tended to show greater REA. These results seem to suggest that higher cognitive function and REA are deeply related and that the difference of WMC can influence the cerebral laterality in auditory-language processing.


Copyright © 2012, Japanese Association of Speech-Language-Hearing Therapists. All rights reserved.

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電子版ISSN 印刷版ISSN 1349-5828 日本言語聴覚士協会

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