"Aha!" effects in a guessing riddle task: An event-related potential study

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	"Aha!" effects in a guessing riddle task: An event-related potential study
	Mai, XQ; Luo, J; Wu, JH; Luo, YJ; Jing Luo
刊名	HUMAN BRAIN MAPPING
	2004-08-01
卷号	22 期号:4 页码:261-270
关键词	insight problem solving event-related potentials dipole source localization anterior cingulate cortex
ISSN号	1065-9471
文献子类	Article
英文摘要	Insight problem solving has been the topic of much investigation. It is believed widely that insight critically contains the process of breaking one's mental set. Recent functional magnetic resonance imaging (fMRI) research on puzzle solving showed that insight was associated with activities in anterior cingulate cortex (ACC) and other areas (Luo and Niki [2003]: Hippocampus 13:274-281). We proposed ACC might mediate processes of breaking one's mental set, given its well-known role in cognitive conflict. In the present research, high-density event-related potentials (ERPs) were recorded to examine the electrophysiologic correlates of insight problem solving. One hundred twenty interesting Chinese riddles (half difficult and half easy) were adopted as materials. For each trial, subjects were either given an easy puzzle followed by a keyword that was consistent with the subject's initial thinking ("No-aha answer"), or a difficult puzzle followed by a keyword that was consistent with an unusual interpretation, so that it broke the subject's initial mental set ("Aha answer"). Results from 14 subjects showed that Aha answers elicited a more negative ERP deflection than did No-aha answers in the time window from 250-500 msec after onset of the answer. The ERP difference wave (Aha minus No-aha answer) showed the maximum amplitude over the central site (Cz) with a peak latency of 380 msec (N380). Voltage and current density maps of the difference wave showed strong activity and current density in the frontocentral region. Dipole analysis localized the generator of the N380 in the ACC. N380 therefore probably reflects an "Aha!" effect, and the ACC generator may be involved in the breaking of mental set.; Insight problem solving has been the topic of much investigation. It is believed widely that insight critically contains the process of breaking one's mental set. Recent functional magnetic resonance imaging (fMRI) research on puzzle solving showed that insight was associated with activities in anterior cingulate cortex (ACC) and other areas (Luo and Niki [2003]: Hippocampus 13:274-281). We proposed ACC might mediate processes of breaking one's mental set, given its well-known role in cognitive conflict. In the present research, high-density event-related potentials (ERPs) were recorded to examine the electrophysiologic correlates of insight problem solving. One hundred twenty interesting Chinese riddles (half difficult and half easy) were adopted as materials. For each trial, subjects were either given an easy puzzle followed by a keyword that was consistent with the subject's initial thinking ("No-aha answer"), or a difficult puzzle followed by a keyword that was consistent with an unusual interpretation, so that it broke the subject's initial mental set ("Aha answer"). Results from 14 subjects showed that Aha answers elicited a more negative ERP deflection than did No-aha answers in the time window from 250-500 msec after onset of the answer. The ERP difference wave (Aha minus No-aha answer) showed the maximum amplitude over the central site (Cz) with a peak latency of 380 msec (N380). Voltage and current density maps of the difference wave showed strong activity and current density in the frontocentral region. Dipole analysis localized the generator of the N380 in the ACC. N380 therefore probably reflects an "Aha!" effect, and the ACC generator may be involved in the breaking of mental set. (C) 2004 Wiley-Liss, Inc.
学科主题	认知神经科学
语种	英语
WOS记录号	WOS:000223036600001
公开日期	2011-08-22
内容类型	期刊论文
源URL	[http://ir.psych.ac.cn/handle/311026/5110]
专题	心理研究所_中国科学院心理研究所回溯数据库(1956-2010)
通讯作者	Jing Luo
作者单位	Chinese Acad Sci, Inst Psychol, Key Lab Mental Hlth, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Mai, XQ,Luo, J,Wu, JH,et al. "Aha!" effects in a guessing riddle task: An event-related potential study[J]. HUMAN BRAIN MAPPING,2004,22(4):261-270.
APA	Mai, XQ,Luo, J,Wu, JH,Luo, YJ,&Jing Luo.(2004)."Aha!" effects in a guessing riddle task: An event-related potential study.HUMAN BRAIN MAPPING,22(4),261-270.
MLA	Mai, XQ,et al.""Aha!" effects in a guessing riddle task: An event-related potential study".HUMAN BRAIN MAPPING 22.4(2004):261-270.