Social network proximity predicts similar trajectories of psychological states: Evidence from multi-voxel spatiotemporal dynamics
Social network proximity predicts similar trajectories of psychological states: Evidence from multi-voxel spatiotemporal dynamics
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DOI：
10.1016/j.neuroimage.2019.116492
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发表时间：
2020-08-01
期刊：
影响因子：
5.7
通讯作者：
Parkinson, Carolyn
中科院分区：
文献类型：
--
作者：
Hyon, Ryan;Kleinbaum, Adam M.;Parkinson, Carolyn
同质性是人类社会网络的一个普遍特征：个人倾向于与那些在身体特征和人口特征（如年龄、性别和种族）方面与自己相似的人联系和联系。最近使用功能性磁共振成像技术的研究表明，在观看视听电影时，个体在现实世界的社会网络接近度（即，无论他们是朋友、朋友的朋友还是社会关系更远的人）和他们的神经反应时间序列中的主体间相关性（ISC）之间存在正相关关系。然而，传统的ISC方法只捕获了区域平均神经响应的时间演化中的相似性信息，而忽略了细粒度、空间分布的响应拓扑中携带的信息。在这里，我们证明了多体素对自然刺激的反应模式的时间轨迹在朋友之间非常相似，并且预测了社会网络的接近程度，超出了反应幅度波动的影响。此外，跨时间点的多体素反应模式的时间轨迹的主体间相似性与个体在现实世界社会网络中的接近度尤其呈正相关。朋友之间的异常相似性在多模态皮质区域（例如，后顶叶皮质区域）的反应模式的长期时间波动中最为明显，这一事实表明，在自然刺激期间，朋友之间的高级处理方面可能特别相似。考虑到结果的局部性，我们推测，随着时间的推移，社会关系密切的个体在如何分配注意力（例如，在整个环境中，在内部表征中）的内因驱动变化方面可能特别相似。这些结果表明，当暴露于共同的刺激时，朋友可能会经历异常相似的心理状态轨迹，更一般地说，在自然刺激期间，多体素反应模式的时间进化存在有意义的个体差异。
Homophily is a prevalent characteristic of human social networks: individuals tend to associate and bond with others who are similar to themselves with respect to physical traits and demographic attributes, such as age, gender, and ethnicity. Recent research using functional magnetic resonance imaging has demonstrated a positive relationship between individuals’ real-world social network proximity (i.e., whether they are friends, friends-of-friends, or farther removed in social ties) and inter-subject correlation (ISC) in their time series of neural responses when viewing audiovisual movies. However, conventional ISC methods only capture information about similarity in the temporal evolution of region-averaged neural responses, and ignore information carried in fine-grained, spatially distributed response topographies. Here, we demonstrate that temporal trajectories of multi-voxel response patterns to naturalistic stimuli are exceptionally similar among friends and predictive of social network proximity, over and above the effects of response magnitude fluctuations. Furthermore, inter-subject similarity in the temporal trajectory of multi-voxel response patterns across distant points in time was particularly positively associated with individuals’ proximity in their real-world social network. The fact that exceptional similarities among friends were most pronounced in long-range temporal fluctuations of response patterns located in multimodal cortical regions (e.g., regions of posterior parietal cortex) suggests that aspects of high-level processing during naturalistic stimulation may be particularly similar among friends. Given the localization of results, we speculate that socially close individuals may be particularly similar in endogenously driven shifts in how they distribute their attention (e.g., across the environment, within internal representations) over time. These results suggest that friends may experience exceptionally similar trajectories of psychological states when exposed to a common stimulus, and, more generally, that there are meaningful individual differences in the temporal evolution of multi-voxel response patterns during naturalistic stimulation.