However, the basic concepts of these theories, the associated interventions, and even the basic assumptions about dysfunction and the nature of change are quite different, all as their respective approaches in the therapeutic field. session. Bowenian therapy, for example, is designed for the long term, with treatment sometimes taking years to complete. A well-known example of such a long-term process is presented in The Family Crucible, in which two psychologists use many elements of Bowen's theory in a series of family therapy sessions that last nearly two years (Napier & Whitaker).,