The healing and change process envisioned in long-term psychodynamic therapy typically requires at least 2 years of sessions. This is because the goal of therapy is often to change an aspect of one's identity or personality or to integrate key developmental learning missed while the client was stuck at an earlier stage of emotional development.
Practitioners of brief psychodynamic therapy believe that some changes can happen through a more rapid process or that an initial short intervention will start an ongoing process of change that does not need the constant involvement of the therapist. A central concept in brief therapy is that there should be one major focus for the therapy rather than the more traditional psychoanalytic practice of allowing the client to associate freely and discuss unconnected issues. In brief therapy, the central focus is developed during the initial evaluation process, occurring during the first session or two. This focus must be agreed on by the client and therapist. The central focus singles out the most important issues and thus creates a structure and identifies a goal for the treatment. In brief therapy, the therapist is expected to be fairly active in keeping the session focused on the main issue. Having a clear focus makes it possible to do interpretive work in a relatively short time because the therapist only addresses the circumscribed problem area.
Haggerty, J. (2006). Psychodynamic Therapy. Psych Central. Retrieved on March 17, 2012, from http://psychcentral.com/lib/2006/psychodynamic-therapy/