Institute of Medical Informatics, National Cheng Kung University (NCKU), Tainan, Taiwan.
Department of Psychology, NCKU, Tainan, Taiwan.
Sci Rep. 2020 Oct 19;10(1):17601. doi: 10.1038/s41598-020-74699-1.
One of the typical campus scenes is the social interaction between college couples, and the lesson couples must keep learning is to adapt to each other. This fMRI study investigated the shopping interactions of 30 college couples, one lying inside and the other outside the scanner, beholding the same item from two connected PCs, making preference ratings and subsequent buy/not-buy decisions. The behavioral results showed the clear modulation of significant others' preferences onto one's own decisions, and the contrast of the "shop-together vs. shop-alone", and the "congruent (both liked or disliked the item, 68%) vs. incongruent (one liked but the other disliked, and vice versa)" together trials, both revealed bilateral temporal parietal junction (TPJ) among other reward-related regions, likely reflecting mentalizing during preference harmony. Moreover, when contrasting "own-high/other-low vs. own-low/other-high" incongruent trials, left anterior inferior parietal lobule (l-aIPL) was parametrically mapped, and the "yield (e.g., own-high/not-buy) vs. insist (e.g., own-low/not-buy)" modulation further revealed left lateral-IPL (l-lIPL), together with left TPJ forming a local social decision network that was further constrained by the mediation analysis among left TPJ-lIPL-aIPL. In sum, these results exemplify, via the two-person fMRI, the neural substrate of shopping interactions between couples.
校园生活的典型场景之一是情侣之间的社交互动，而情侣必须不断学习的课程是相互适应。本 fMRI 研究调查了 30 对大学生情侣的购物互动，其中一方躺在扫描仪内，另一方躺在扫描仪外，通过两台相连的电脑观看同一件商品，做出偏好评分，并随后做出购买/不购买的决定。行为结果表明，他人的偏好明显影响到自己的决策，“一起购物与独自购物”和“一致（双方都喜欢或不喜欢该商品，占 68%）与不一致（一方喜欢而另一方不喜欢，反之亦然）”这两种情况的对比，都揭示了双侧颞顶联合区（TPJ）等与奖励相关的区域，可能反映了在偏好协调时的心理化过程。此外，当对比“自己高/他人低与自己低/他人高”这两种不一致的情况时，左侧前下顶叶（l-aIPL）被参数映射，“让步（例如，自己高/不购买）与坚持（例如，自己低/不购买）”的调制进一步揭示了左侧外侧顶叶（l-lIPL），与左侧 TPJ 一起形成了一个局部社会决策网络，该网络进一步受到左 TPJ-lIPL-aIPL 之间中介分析的约束。总之，这些结果通过两人 fMRI 示例说明了情侣购物互动的神经基础。
