“…The theories covered are: Freud's group psychology (Scheidlinger, 1980); Bion's basic assumption groups (Rioch, 1970); Foulkes' theory of group analysis (Foulkes, 1957); Ezreil's theory of group analysis (Ezreil, 1973); Whitaker and Lieberman's focal conflict theory (Whitman & Stock, 1980); societal groups and ego development (Erikson, 1980); systems theory (Durkin, 1975); stages of group development (Dugo & Beck, 1984); self psychology and the narcissistic phase of group development (Lonergan, 1982).…”