Counting in everyday life: Discrimination and enumeration

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	Counting in everyday life: Discrimination and enumeration
	Nan, Yun ; Knoesche, Thomas R.; Luo, Yue-Jia; Y. J. Luo
摘要	Enumerating the number of items in a set accurately and quickly is a basic mathematical skill. This ability is especially crucial in the more real-life situations, where relevant items have to be discriminated from irrelevant distracters. Although much work has been done on the brain mechanisms and neural correlates of the enumeration and/or discrimination process, no agreement has been reached yet. We used event-related potentials (ERPs) to show the time course of brain activity elicited by a task that involved both enumeration and discrimination at the same time. We found that even though the two processes run to some extent in parallel, discrimination seems to take place mainly in an earlier time window (from 100 ms after the stimulus onset) than enumeration (beyond 200 ms after the stimulus onset). Moreover, electrophysiological evidence based on the N2 and P3 components make it reasonable to argue for the existence of a dichotomy between subitizing (for sets of less than four items) and counting (for sets of four and more items). Source estimation suggests that subitizing and counting, though being distinct brain processes, do recruit similar brain areas.; Enumerating the number of items in a set accurately and quickly is a basic mathematical skill. This ability is especially crucial in the more real-life situations, where relevant items have to be discriminated from irrelevant distracters. Although much work has been done on the brain mechanisms and neural correlates of the enumeration and/or discrimination process, no agreement has been reached yet. We used event-related potentials (ERPs) to show the time course of brain activity elicited by a task that involved both enumeration and discrimination at the same time. We found that even though the two processes run to some extent in parallel, discrimination seems to take place mainly in an earlier time window (from 100 ms after the stimulus onset) than enumeration (beyond 200 ms after the stimulus onset). Moreover, electrophysiological evidence based on the N2 and P3 components make it reasonable to argue for the existence of a dichotomy between subitizing (for sets of less than four items) and counting (for sets of four and more items). Source estimation suggests that subitizing and counting, though being distinct brain processes, do recruit similar brain areas. (c) 2005 Elsevier Ltd. All rights reserved.
关键词	subitizing counting event-related potential (ERP)
学科领域	认知心理学
	2006
语种	英语
发表期刊	NEUROPSYCHOLOGIA
ISSN	0028-3932
卷号	44 期号:7 页码:1103-1113
期刊论文类型	Article
收录类别	SCI ; SSCI
WOS记录号	WOS:000237637400011
引用统计	被引频次：29[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.psych.ac.cn/handle/311026/5283
专题	中国科学院心理研究所回溯数据库(1956-2010)
通讯作者	Y. J. Luo
作者单位	1.Chinese Acad Sci, Inst Psychol, Key Lab Mental Hlth, Beijing 100101, Peoples R China 2.MPI Human Cognit & Brain Sci, Leipzig, Germany 3.Beijing Normal Univ, Nat Key Lab Cognit Neurosci & Learning, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Nan, Yun,Knoesche, Thomas R.,Luo, Yue-Jia,et al. Counting in everyday life: Discrimination and enumeration[J]. NEUROPSYCHOLOGIA,2006,44(7):1103-1113.
APA	Nan, Yun,Knoesche, Thomas R.,Luo, Yue-Jia,&Y. J. Luo.(2006).Counting in everyday life: Discrimination and enumeration.NEUROPSYCHOLOGIA,44(7),1103-1113.
MLA	Nan, Yun,et al."Counting in everyday life: Discrimination and enumeration".NEUROPSYCHOLOGIA 44.7(2006):1103-1113.

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