Social networks and neural receptivity to persuasive health messages.
Social networks and neural receptivity to persuasive health messages.
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DOI：
10.1037/hea0001059
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发表时间：
2021-04
期刊：
影响因子：
--
通讯作者：
Falk EB
中科院分区：
文献类型：
--
作者：
Pandey P;Kang Y;Cooper N;O'Donnell MB;Falk EB
社交网络中与健康相关的规范可以影响人们是否对健康行为改变持开放态度。然而，人们对社交网络与个体大脑对有说服力的健康信息的反应方式之间的关系知之甚少。目前的研究集中在腹内侧前额叶皮层（VMPFC）的活动作为一个指标的神经感受性的健康信息，可能与行为改变。该研究测试了参与者社交网络中与健康相关的规范和感知的身体活动水平是否与健康信息的神经接受性有关。最初报告身体活动低于200分钟/周的成年人（N=146）对核心社交网络中每个人的身体活动水平和亲密程度进行了评分。VMPFC活动使用功能磁共振成像监测，而参与者看到有说服力的健康信息，促进身体活动。在为期两周的基线和功能磁共振成像扫描后的一个月内，使用腕戴式加速度计客观记录久坐行为的纵向变化。在参与者的社交网络中，更高水平的身体活动与信息暴露期间更大的VMPFC活动相关，这反过来又与久坐分钟数的更大减少相关。相比之下，更接近身体不活跃的社会关系与较低的VMPFC活动。社交网络中的感知规范与健康信息的神经接受性有关。特别是，与身体不活跃的关系密切与对鼓励身体活动的健康信息的神经接受性较低有关，这可能会破坏健康信息的有效性。
Health-related norms in social networks can influence whether people are open to health behavior change. Yet, little is known about how social networks relate to the ways individual brains respond to persuasive health messaging. The current study focuses on ventromedial prefrontal cortex (VMPFC) activity as an index of neural receptivity to health messages that may be related to behavior change. The study tested whether health-related norms and perceived physical activity levels within participants’ social networks are associated with neural receptivity to health messages. Adults who initially reported under 200 minutes/week of physical activity (N=146) rated the perceived physical activity levels of, and closeness to, each person in their core social network. VMPFC activity was monitored using fMRI while participants viewed persuasive health messages promoting physical activity. Longitudinal changes in sedentary behavior were objectively logged using wrist-worn accelerometers throughout a two-week baseline and the month following the fMRI scan. Higher levels of perceived physical activity in participants’ social networks were associated with greater VMPFC activity during message exposure, which in turn were associated with greater decreases in sedentary minutes. By contrast, greater closeness to physically inactive social ties was associated with lower VMPFC activity. Perceived norms in social networks relate to neural receptivity to health messaging. In particular, closeness to physically inactive ties is associated with lower neural receptivity to health messages encouraging physical activity, which may undermine the effectiveness of health messages.
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