This chapter defines the conceptual boundaries of psychoanalysis and group analysis. The psychoanalyst offers his understanding to his patient, who is based on the psychoanalytical ordering of psychological data, through his interpretations and, hopefully, helps his patient to bring about a fundamental re-structuring of his psychology. Group analytic theory has definite notions of time space and causality. These were devised by Trigant Burrow, Moreno and Foulkes as therapists, as ideological models which differ from that of psychoanalysis. The conductor's communications and responses are dictated by his theories. He recognises two basic levels of action, those of communication and of change. The level of communication of the conductor is also variable although they tend to remain at a high level of organisation. Freud's observations on groups related to large organised groups such as the Church and Army or else to mass phenomena as exhibited by mobs and crowds.