AbstractThis is a brief account of eight years work with a mixed psychiatric group, and two years work with a ‘category A’ prison group using Pat de Maré’s Median Group theory and illustrating some of these principles.KeywordsstructuredialogueindividuationtranspostionGet full access to this articleView all access options for this article.Get accessReferences1. de Maré P.B. Piper R. Thompson S. (1991) Koinonia: From Hate, Through Dialogue, to Culture in the Large Group. London: Karnac Books.