A paper written by Dr. Jonathan Shedler and published in the American Psychologist is reviewed and discussed in which a meta-analysis of evidenced based research supports the efficacy and effectiveness of psychodynamic therapy in the treatment of a variety of mental disorders including personality disorders. The benefits of this therapy appear to increase with time whereas the benefits of other non-psychodynamic therapies tend to decay over time. Evidence is also presented which points out the role of psychodynamic processes in non psychodynamic therapy such as CBT.