This is a great book laying out the Tavistock Clinic method of group training. It served as the textbook for a three-semester grad school sequence on training. It explained all of the bizarre behaviors we all witnessed, and even participated in, during the training process.
In groups people go nuts in very specific, predictable ways. Leaders in training can experience themselves, and witness others, going nuts in precisely these ways, and then through self-study come to understand the group factors that drive themselves and others nuts.
A. K. Rice explains how to set up such groups and how to learn from them.