Wilfred Bion (1961) studied group dynamics from a psychoanalytic perspective, and stated that he was much influenced by Wilfred Trotter for whom he worked at University College Hospital London, as did another key figure in the Psychoanalytic movement, Ernest Jones.
M. Scott Peck developed stages for larger-scale groups (i.e., communities) which are similar to Tuckman's stages of group development [REF].