Research by Hebrew University of Jerusalem psychologist Prof. Ariel Knafo shows that children who mimic each other’s body language for mere minutes are more likely to share feelings of similarity and closeness, and to potentially engage in more pro-social, positive behaviors.

http://new.huji.ac.il/en/article/26278 http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0120878