A TED talk on the science of social connection is to be found at
https://www.youtube.com/watch?v=jlXJnlmAXt0&feature=c4-overview&list=UUzno-z2lWDjrjU9J3Xd-L3Q
The peer reviewed article on which the
TED talk above is based can be found at http://ccare.stanford.edu/article/social-connection-and-compassion-important-predictors-of-health-and-well-being/
and the references on which the article is based are atwwww.newschool.edu/cps/socres-802-Sepalla-Rossomando-Doty.
In addition, the website for the Stanford Center for Compassion and Altruism Research has a number of other peer reviewed papers online that may be of interest to Psychodrama practitioners and trainers and students.