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• Original Article •
The impact of others’ decision on individual risk-taking behavior: A rs-fMRI study
XU Jia-lin  ZHENG Li  LIU Zhi-yuan  YANG Guang  GUO Xiu-yan 

DOI:10.12015/issn.1674-8034.2018.06.009.


[Abstract] Objective: By combining the sequential risk taking task and the resting-state functional magnetic resonance imaging (rs-fMRI) technique, the current study tried to investigate the influence of others’ risk-taking behavior on the individual’s emotion and risk-taking behavior.Materials and Methods: After the scanning of rs-fMRI, participants were asked to finish the sequential risk taking task. In the each trial of the task, participants firstly could get the information of others’ outcome. Others’ outcomes were divided into good, general and poor conditions. Secondly, participants were asked to rate their feelings on a 9-point scale towards others’ outcome. Finally, participants finished a similar risk-taking task. After the experiment, participants were asked to fill out the social comparison orientation scale. In the current study, we calculated three indexes to describe the individual differences: (1) The tendency of individual’s social comparison, which was measured by the social comparison orientation scale. (2) The sensitivity of individual’s emotion to others’ outcomes, which was defined as the difference of the participants’ emotional ratings towards others’ different outcomes. (3) The sensitivity of individual’s behavior changing to others’ outcomes, which was defined as the difference of the participants’ behavior changing after others’ different outcomes. Besides, DPARSFA toolbox was used to calculate the functional connectivity (FC) among orbitofrontal cortex (OFC), striatum and inferior parietal lobule (IPL) and calculate the regional homogeneity (ReHo) value. Then, correlation analysis was conducted to examine the relationship between rs-fMRI data (FC and ReHo values) and the three indexes of individual differences.Results: The results showed that the tendency of individual’s social comparison was positively correlated with the functional connectivity between left OFC and right striatum. Moreover, the sensitivity of individual’s behavior changing to others’ outcomes was negatively correlated with the functional connectivity between left striatum and right IPL. In addition, the sensitivity of individual’s behavior changing to others’ outcomes was negatively correlated with the ReHo value of right OFC.Conclusions: The functional connectivity among OFC, striatum and IPL, as well as the ReHo value of OFC are associated with the impact of others’ outcomes on individual’s emotion and risk-taking behavior.
[Keywords] Sequential risk taking task；Magnetic resonance imaging, functional；Functional connectivity；Regional homogeneity；Orbitofrontal cortex；Striatum；Inferior parietal lobule

XU Jia-lin Shanghai Key Laboratory of Magnetic Resonance, Department of Physics, East China Normal University, Shanghai 200062, China; School of Physics and Materials Science, East China Normal University, Shanghai 200062, China

ZHENG Li Shanghai Key Laboratory of Magnetic Resonance, Department of Physics, East China Normal University, Shanghai 200062, China; School of Psychology and Cognitive Science, East China Normal University, Shanghai 200062, China; Shanghai Key Laboratory of Brain Functional Genomics, East China Normal University, Shanghai 200062, China; National Demonstration Center for Experimental Psychology Education, East China Normal University, Shanghai 200062, China

LIU Zhi-yuan* Shanghai Key Laboratory of Magnetic Resonance, Department of Physics, East China Normal University, Shanghai 200062, China; School of Physics and Materials Science, East China Normal University, Shanghai 200062, China

YANG Guang* Shanghai Key Laboratory of Magnetic Resonance, Department of Physics, East China Normal University, Shanghai 200062, China; School of Physics and Materials Science, East China Normal University, Shanghai 200062, China

GUO Xiu-yan Shanghai Key Laboratory of Magnetic Resonance, Department of Physics, East China Normal University, Shanghai 200062, China; School of Psychology and Cognitive Science, East China Normal University, Shanghai 200062, China; Shanghai Key Laboratory of Brain Functional Genomics, East China Normal University, Shanghai 200062, China; National Demonstration Center for Experimental Psychology Education, East China Normal University, Shanghai 200062, China

*Correspondence to: Liu ZY, E-mail:liu198372@126.com; Yang G, E-mail: gyang@phy.ecnu.edu.cn

Conflicts of interest   None.

ACKNOWLEDGMENTS  This work was part of Key Program of the National Social Science Foundation of China No.14AZD106 National Educational Science for Youth Foundation of China No.CBA160186
Received  2018-03-09
Accepted  2018-04-24
DOI: 10.12015/issn.1674-8034.2018.06.009
DOI:10.12015/issn.1674-8034.2018.06.009.

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