With full respect for the constraints of the social unconscious, Earl Hopper applies his theory of Incohesion to the treatment of'difficult' patients in group analysis. The personification of aggregation and massification - patients with crustacean, contact-shunning and amoeboid, merger-hungry characteristics respectively - is illustrated with detailed clinical vignettes from heterogeneous groups, including drug addicts, victims of incest and sexual abuse, and child survivors of the Shoah. Copyright (C) Muze Inc. 2005. For personal use only. All rights reserved.