Many mechanisms of social bonding are common to all primates, but humans seemingly have developed some that are unique to the species. These involve various kinds of interactive experiences-from taking a walk together to having a conversation-whose common feature is the triadic sharing of experience. Current theories of social bonding have no explanation for why humans should have these unique bonding mechanisms. Here we propose a shared intentionality account of uniquely human social bonding. Humans evolved to participate with others in unique forms of cooperative and communicative activities that both depend on and create shared experience. Sharing experience in these activities causes partners to feel closer because it allows them to assess their partner's cooperative competence and motivation toward them and because the shared representations created during such interactions make subsequent cooperative interactions easier and more effective.

中文翻译：

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独特的人类社会联系的共享意向性描述。

许多社会联系机制是所有灵长类动物所共有的，但人类似乎已经发展出了一些该物种独有的机制。这些涉及各种互动体验——从一起散步到交谈——其共同特征是经验的三重分享。当前的社会联系理论无法解释为什么人类应该拥有这些独特的联系机制。在这里，我们提出了对人类独特的社会联系的共同意向性解释。人类进化为以独特形式的合作和交流活动与他人参与，这些活动既依赖于共享经验，又创造了共享经验。在这些活动中分享经验可以使合作伙伴感觉更加亲密，因为这使他们能够评估合作伙伴的合作能力和对他们的动机，并且因为在这种互动过程中创建的共享表征使后续的合作互动变得更容易和更有效。