Contents : A historical review of psychoanalytic paradigms / Arnold M. Cooper -- The structural hypothesis / Jacob A. Arlow -- The Klein-Bion model / Hanna Segal -- The interpersonal (Sullivanian) model / Edgar Levenson -- Psychoanalytic self psychology / Arnold Goldberg -- Object relations theory / Arnold H. Modell -- Lacanian theory / William J. Richardson -- A discussion of the various theories / Joseph Sandler -- Conclusion / Arnold Rothstein.