Lund University Cognitive Science, Lund University, Lund 221 00, Sweden.
Sciences et Technologies de la Musique et du Son Lab, UMR 9912 (Institut de Recherche et Coordination Acoustique Musique/CNRS/Sorbonne Univeristé), Paris 75004, France.
Proc Natl Acad Sci U S A. 2024 Nov 5;121(45):e2400369121. doi: 10.1073/pnas.2400369121. Epub 2024 Oct 28.
Social interaction research is lacking an experimental paradigm enabling researchers to make causal inferences in free social interactions. For instance, the expressive signals that causally modulate the emergence of romantic attraction during interactions remain unknown. To disentangle causality in the wealth of covarying factors that govern social interactions, we developed an open-source video-conference platform enabling researchers to covertly manipulate the social signals produced by participants during interactions. Using this platform, we performed a speed-dating experiment where we aligned or misaligned the facial smiles of participants in real time with face transformation algorithms. Even though participants remained totally unaware that their faces were being manipulated, aligning their smiles causally enhanced the romantic attraction they felt toward each other, compared to unaligned scenarios. Manipulations also influenced how participants synchronized and vocally reacted to each other. This paradigm causally manipulates the emergence of romantic attraction in free social interactions. Moreover, our methodology opens the possibility to perform causal inferences during free social interactions.
社会互动研究缺乏一种实验范式，使研究人员能够在自由的社会互动中做出因果推断。例如，因果调节互动中浪漫吸引力出现的表达信号仍然未知。为了解开在众多影响社会互动的共同因素中造成的因果关系，我们开发了一个开源的视频会议平台，使研究人员能够在互动过程中秘密地操纵参与者产生的社会信号。使用这个平台，我们进行了一个速配实验，我们使用面部变换算法实时对齐或不对齐参与者的面部微笑。尽管参与者完全不知道他们的脸被操纵了，但与不对齐的情况相比，对齐他们的微笑会导致他们彼此之间产生更强的浪漫吸引力。这种操纵还影响了参与者彼此之间的同步和声音反应方式。这种范式在自由的社会互动中因果地操纵了浪漫吸引力的出现。此外，我们的方法为在自由的社会互动中进行因果推断开辟了可能性。
