Human vision serves the social function of detecting and discriminating with high efficiency conspecifics and other animals. The social world is made of social entities as much as the relations between those entities. Recent work demonstrates that vision encodes visuo-spatial relations between bodies with the same efficiency and high specialization of face/body perception. Specifically, perception of face-to-face (vs. non-facing) bodies evokes effects compatible with the most robust markers of face-specificity such as the behavioral inversion effect and increased activity in selective visual areas. Another set of results suggests that face-to-face bodies are processed as a grouped unit, analogously to facial features in a face. The facing dyad in the visual cortex may be the earliest rudimentary representation of social interaction.

人的视觉具有检测和区分高效率的物种和其他动物的社会功能。社会世界由社会实体以及这些实体之间的关系构成。最近的工作表明，视觉以相同的效率和面部/身体感知的高度专业化来编码身体之间的视觉空间关系。具体而言，面对面（相对于非面对）体的感知唤起了与最强健的面部特异性标记物兼容的效果，例如行为反转效果和选择性视觉区域活动的增强。另一组结果表明，将面对面的身体作为一个分组的单元进行处理，类似于脸部中的脸部特征。视觉皮层中面临的二元性可能是社交互动的最早的基本代表。