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Reduced late positivity in younger adults, but not older adults, during short-term repetition
Ting Zhou1,2; Juan Li1; Lucas S. Broster3; Yanan Niu1; Pengyun Wang1,2
First AuthorTing Zhou
2015
Source PublicationBRAIN RESEARCH
SubtypeArticle
Volume1594Issue:不详Pages:223-232
Abstract

Although word repetition was generally associated with enhanced amplitude of late positive complex (LPc), it seemed to yield attenuated LPC when words were repeated over short enough lags. However, this issue and its corresponding age effects have not been examined directly. For this purpose, EEG was recorded when young and elderly participants were required to make animacy decision during an incidental word repetition paradigm with words repeated after one, six, or nine intervening words. The results revealed that with one intervening word lag LPC decreased for nonliving words which supposed to be related to higher semantic activation levels reflected by larger N400, unchanged for living words associated with lower semantic incongruity activation levels, and increased in relatively longer lags (with six or nine intervening words) in the young group. Whereas, enhanced LPC was observed in the elderly in all conditions. Furthermore, significant age-related LPC repetition differences were revealed only with one intervening word lag for nonliving words. The results suggested that (1) how LPC changes after repetition is influenced by the initial incongruity activation levels of items and their thereafter maintenance in short-term memory; (2) the age-related differences result from the declining of short-term memory maintenance rather than from initial lower incongruity activations among elderly adults. (C) 2014 Elsevier B.V. All rights reserved.

KeywordWord Repetition Aging Lag Lpc N400
DOI10.1016/j.brainres.2014.10.042
Indexed BySCIE
Language英语
Citation statistics
Document Type期刊论文
Identifierhttp://ir.psych.ac.cn/handle/311026/26567
Collection健康与遗传心理学研究室
Affiliation1.Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of sciences, Beijing, China
2.Graduate School, Chinese Academy of Sciences, Beijing, China
3.University of Kentucky College of Medicine, Lexington, Kentucky
Recommended Citation
GB/T 7714
Ting Zhou,Juan Li,Lucas S. Broster,et al. Reduced late positivity in younger adults, but not older adults, during short-term repetition[J]. BRAIN RESEARCH,2015,1594(不详):223-232.
APA Ting Zhou,Juan Li,Lucas S. Broster,Yanan Niu,&Pengyun Wang.(2015).Reduced late positivity in younger adults, but not older adults, during short-term repetition.BRAIN RESEARCH,1594(不详),223-232.
MLA Ting Zhou,et al."Reduced late positivity in younger adults, but not older adults, during short-term repetition".BRAIN RESEARCH 1594.不详(2015):223-232.
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