 Along with others drawing on the ideas of the Human Potential Movement, he extended the group idea to broad population of 'normals' seeking personal growth, which he called encounter groups, after the existential tradition of an authentic encounter between people.Other leaders in the development of encounter groups, including Will Schutz, worked at the Esalen Institute in Big Sur, California.Schutz himself stressed how "the terms 'T-group' (T for training) and 'sensitivity training group' are commonly used...synonymously with 'encounter group'".