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Inconspicuous anchoring effects generated by false information
Qu, Chen1,2; Wang, Jun1; Luo, Yuejia1,3; Y. J. Luo
2008-11-10
Source PublicationPROGRESS IN NATURAL SCIENCE
ISSN1002-0071
SubtypeArticle
Volume18Issue:11Pages:1375-1382
AbstractThe 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.
KeywordFalse anchors Anchoring effects Accessibility Adjustment ERP
Subject Area认知心理学
Indexed BySCI ; SSCI
Language英语
WOS IDWOS:000262137200007
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.psych.ac.cn/handle/311026/5471
Collection中国科学院心理研究所回溯数据库(1956-2010)
Corresponding AuthorY. J. Luo
Affiliation1.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
Recommended Citation
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.
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