Inconspicuous anchoring effects generated by false information

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	Inconspicuous anchoring effects generated by false information
	Qu, Chen 1,2; Wang, Jun1 ; Luo, Yuejia1,3 ; Y. J. Luo
刊名	PROGRESS IN NATURAL SCIENCE
	2008-11-10
卷号	18 期号:11 页码:1375-1382
关键词	False anchors Anchoring effects Accessibility Adjustment ERP
ISSN号	1002-0071
文献子类	Article
英文摘要	The impact of false information on numerical judgments was examined on young normal subjects by an event-related potential ( ERP) experiment. To imitate the judgments in real world, we ensured the subjects acknowledged of the target task. The behavioral results found that both uncertain information and false information assimilated the final estimates: higher after higher anchors and lower after lower anchors; and false information caused a weaker anchoring bias than uncertain information. ERP results provided further electrophysiological evidence for the mechanism of anchoring. In the early phrase, it was an accessibility-dominated process in which two kinds of anchors elicited an N300 component related to the accessibility of anchors propositions. The knowledge relevant to targets joined the process in the late phrase, which caused a larger amplitude of late positive component (LPC) for implausible lower anchors than that for plausible higher anchors. Source analysis showed that medial frontal gyrus, whose activity was suggested to signal the need of adjustment, was more reliable to explain the LPC elicited by implausible lower anchors. Therefore, we suggest that accessibility is facilitated when the external anchor is consistent with the world knowledge, and adjustment is initiated when the external anchor is inconsistent.; The impact of false information on numerical judgments was examined on young normal subjects by an event-related potential ( ERP) experiment. To imitate the judgments in real world, we ensured the subjects acknowledged of the target task. The behavioral results found that both uncertain information and false information assimilated the final estimates: higher after higher anchors and lower after lower anchors; and false information caused a weaker anchoring bias than uncertain information. ERP results provided further electrophysiological evidence for the mechanism of anchoring. In the early phrase, it was an accessibility-dominated process in which two kinds of anchors elicited an N300 component related to the accessibility of anchors propositions. The knowledge relevant to targets joined the process in the late phrase, which caused a larger amplitude of late positive component (LPC) for implausible lower anchors than that for plausible higher anchors. Source analysis showed that medial frontal gyrus, whose activity was suggested to signal the need of adjustment, was more reliable to explain the LPC elicited by implausible lower anchors. Therefore, we suggest that accessibility is facilitated when the external anchor is consistent with the world knowledge, and adjustment is initiated when the external anchor is inconsistent. (C) 2008 National Natural Science Foundation of China and Chinese Academy of Sciences. Published by Elsevier Limited and Science in China Press. All rights reserved.
学科主题	认知心理学
语种	英语
WOS记录号	WOS:000262137200007
公开日期	2011-08-22
内容类型	期刊论文
源URL	[http://ir.psych.ac.cn/handle/311026/5472]
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	Y. J. Luo
作者单位	1.Beijing Normal Univ, State Key Lab Cognit Neurosci & Learning, Beijing 100875, Peoples R China 2.S China Normal Univ Guangzhou, Ctr Studies Psychol Applicat, Guangzhou 510631, Peoples R China 3.Chinese Acad Sci, Inst Psychol, Key Lab Mental Hlth, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Qu, Chen,Wang, Jun,Luo, Yuejia,et al. Inconspicuous anchoring effects generated by false information[J]. PROGRESS IN NATURAL SCIENCE,2008,18(11):1375-1382.
APA	Qu, Chen,Wang, Jun,Luo, Yuejia,&Y. J. Luo.(2008).Inconspicuous anchoring effects generated by false information.PROGRESS IN NATURAL SCIENCE,18(11),1375-1382.
MLA	Qu, Chen,et al."Inconspicuous anchoring effects generated by false information".PROGRESS IN NATURAL SCIENCE 18.11(2008):1375-1382.