Is Payoff Necessarily Weighted by Probability When Making a Risky Choice? Evidence from Functional Connectivity Analysis

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	Is Payoff Necessarily Weighted by Probability When Making a Risky Choice? Evidence from Functional Connectivity Analysis
	Rao, Li-Lin1 ; Li, Shu1 ; Jiang, Tianzi 2,3,4; Zhou, Yuan1
刊名	PLOS ONE
	2012-07-17
卷号	7 期号:7 页码:e41048
ISSN号	1932-6203
通讯作者	Rao, LL (reprint author), Chinese Acad Sci, Inst Psychol, Key Lab Behav Sci, Magnet Resonance Imaging Res Ctr, Beijing 100101, Peoples R China.
产权排序	1
英文摘要	How people make decisions under risk remains an as-yet-unresolved but fundamental question. Mainstream theories about risky decision making assume that the core processes involved in reaching a risky decision include weighting each payoff or reward magnitude by its probability and then summing the outcomes. However, recently developed theories question whether payoffs are necessarily weighted by probability when making a risky choice. Using functional connectivity analysis, we aimed to provide neural evidence to answer whether this key assumption of computing expectations holds when making a risky choice. We contrasted a trade-off instruction choice that required participants to integrate probability and payoff information with a preferential choice that did not. Based on the functional connectivity patterns between regions in which activity was detected during both of the decision-making tasks, we classified the regions into two networks. One network includes primarily the left and right lateral prefrontal cortices and posterior parietal cortices, which were found to be related to probability in previous reports, and the other network is composed of the bilateral basal ganglia, which have been implicated in payoff. We also found that connectivity between the payoff network and some regions in the probability network (including the left lateral prefrontal cortices and bilateral inferior parietal lobes) were stronger during the trade-off instruction choice task than during the preferential choice task. This indicates that the functional integration between the probability and payoff networks during preferential choice was not as strong as the integration during trade-off instruction choice. Our results provide neural evidence that the weighting process uniformly predicted by the mainstream theory is unnecessary during preferential choice. Thus, our functional integration findings can provide a new direction for the investigation of the principles of risky decision making.
学科主题	Psychology research method
收录类别	SCI
项目简介	This research was partially supported by the National Basic Research Program of China (973 Program, No. 2011CB711000), National Natural Science Foundation of China (No. 31170976), the Knowledge Innovation Program of the Chinese Academy of Sciences (KSCX2-EW-J-8), and Project for Young Scientists Fund, Institute of Psychology, Chinese Academy of Sciences (Y0CX163S01). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. No additional external funding received for this study.
原文出处	http://bdm.psych.ac.cn/upload1/Is%20Payoff%20Necessarily%20Weighted%20by%20Probability%20When%20Making%20a%20Risky%20Choice_%20Evidence%20from%20Functional%20Connectivity%20Analysis.pdf
语种	英语
WOS记录号	WOS:000306507000056
内容类型	期刊论文
源URL	[http://ir.psych.ac.cn/handle/311026/11876]
专题	心理研究所_中国科学院行为科学重点实验室
作者单位	1.Chinese Acad Sci, Inst Psychol, Key Lab Behav Sci, Magnet Resonance Imaging Res Ctr, Beijing 100101, Peoples R China 2.Chinese Acad Sci, LIAMA Ctr Computat Med, Natl Lab Pattern Recognit, Inst Automat, Beijing, Peoples R China 3.Univ Elect Sci & Technol China, Sch Life Sci & Technol, Key Lab NeuroInformat, Minist Educ, Chengdu 610054, Peoples R China 4.Univ Queensland, Queensland Brain Inst, Brisbane, Qld, Australia
推荐引用方式 GB/T 7714	Rao, Li-Lin,Li, Shu,Jiang, Tianzi,et al. Is Payoff Necessarily Weighted by Probability When Making a Risky Choice? Evidence from Functional Connectivity Analysis[J]. PLOS ONE,2012,7(7):e41048.
APA	Rao, Li-Lin,Li, Shu,Jiang, Tianzi,&Zhou, Yuan.(2012).Is Payoff Necessarily Weighted by Probability When Making a Risky Choice? Evidence from Functional Connectivity Analysis.PLOS ONE,7(7),e41048.
MLA	Rao, Li-Lin,et al."Is Payoff Necessarily Weighted by Probability When Making a Risky Choice? Evidence from Functional Connectivity Analysis".PLOS ONE 7.7(2012):e41048.