Neural bases of recommendations differ according to social network structure.
Neural bases of recommendations differ according to social network structure.
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DOI：
10.1093/scan/nsw158
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发表时间：
2017-01-01
影响因子：
4.2
通讯作者：
Falk EB
中科院分区：
文献类型：
--
作者：
O'Donnell MB;Bayer JB;Cascio CN;Falk EB
想法在社交网络中传播，但并不是每个人都能平等地成为成功的推荐者。那些有更多机会与其他没有联系的人联系的人--高信息经纪人--在做推荐时，他们的大脑使用方式与低信息经纪人不同吗？我们测试的假设，那些有更多的机会，信息经纪人可能会使用大脑系统，涉及考虑的想法，观点和精神状态的其他人（即“精神化”）时，传播思想。我们使用社会网络分析来量化个人的信息经纪机会。当参与者收到关于移动的游戏应用程序的同伴意见的反馈时，这可以作为元分析定义的与心智化相关的神经区域（背内侧前额叶皮层、颞顶叶交界处、内侧前额叶皮层/后扣带皮层、颞中回）内活动的预测因子。较高的信息经纪人表现出更多的活动，在这个心理化网络时，收到不同的同行反馈和更新他们的建议。这些数据支持了这样一种观点，即处于不同网络位置的人可能会以不同的方式使用大脑来执行社交任务。不同的社交网络位置可能会提供更多参与特定心理过程的机会。或者，那些倾向于更多地参与这些过程的人可能会将自己置于系统性不同的网络位置。这些数据突出了从大脑网络到社交网络的综合分析水平的价值。
Ideas spread across social networks, but not everyone is equally positioned to be a successful recommender. Do individuals with more opportunities to connect otherwise unconnected others—high information brokers—use their brains differently than low information brokers when making recommendations? We test the hypothesis that those with more opportunities for information brokerage may use brain systems implicated in considering the thoughts, perspectives, and mental states of others (i.e. ‘mentalizing’) more when spreading ideas. We used social network analysis to quantify individuals’ opportunities for information brokerage. This served as a predictor of activity within meta-analytically defined neural regions associated with mentalizing (dorsomedial prefrontal cortex, temporal parietal junction, medial prefrontal cortex, /posterior cingulate cortex, middle temporal gyrus) as participants received feedback about peer opinions of mobile game apps. Higher information brokers exhibited more activity in this mentalizing network when receiving divergent peer feedback and updating their recommendation. These data support the idea that those in different network positions may use their brains differently to perform social tasks. Different social network positions might provide more opportunities to engage specific psychological processes. Or those who tend to engage such processes more may place themselves in systematically different network positions. These data highlight the value of integrating levels of analysis, from brain networks to social networks.