From Jonah Lehrer's book "How We Decide", he mentions the experiments with rats and Yale undergraduates. I found the paper that (presumably) matches the experiment of rats. Brunswik, E. (1939). ...
In yoga, the instructor mentioned that controlled deep breathing can increase self-confidence. (Next time, I will ask him why he believes that but I doubt he has any references...) Furthermore, ...
I'll preface this by saying that I've been considering this question in light of the "Summer of Love" initiative and subsequent blog posts, which are looking at the extent to which comments are ...