In the assigned chapter, Bohart and Tallman (2010) discussed clients and their effects on therapy. They argued that client influences and extratherapeutic influences are the most important factor in determining the outcome of therapy. In fact, up to 87% of the variance in therapy outcomes is attributable to the client, factors occurring outside of therapy, and unexplained variance (Bohart & Tallman, 2010, p. 84). Bohart and Tallman further argued that approximately 40% of the variance can be attributed to client factors, while only 13% can be explained by the treatment (e.g., therapeutic relationship, interventions, therapist, the therapy model). Unfortunately, traditional conceptualizations of psychotherapy have largely ignored these client-related factors (Bohart & Tallman, 2010, pp. 92-84). Instead, the focus has been on the therapeutic process, the therapist and their interventions, which do not contribute as much to the therapeutic outcome as client-related factors. According to Bohart and Tallman, it is clear that more attention needs to be paid to the critical effect that clients have on therapy outcomes (pp. 94-95). EvaluationFirst, Bohart and Tallman (2010) discussed the role of the medical model in psychotherapy (pp. 92-94). The medical model focuses on diagnosis and specific treatment based on that diagnosis. Bohart and Tallman said the medical model of psychotherapy is not supported by research. They stated that research shows that “all genuine therapeutic approaches work about equally well, regardless of diagnosis…Research also questions the importance of technique” (Bohart & Tallman, 2010, p. 92 ). They also discussed inconsistent findings regarding professional training and therapeutic outcomes. Finally, they pointed out that... in the middle of the article...... Bohart and Tallman (2010) make valid points, it is possible that their reasoning is taken too far. If pushed too far, their arguments can be used to say, "Therapy is always useless." It can also lead some therapists to undertrain due to an underlying message that says, "Therapists don't need to do much in therapy because the client will do all the work." » Balance is necessary when the therapist's training and expertise are valued, as are the invaluable contributions the client can make to their progress in therapy. Works Cited Bohart, AC and Tallman, K. (2010). Customers: the overlooked common factor. In BLDuncan, SD Miller, BE Wampold, & MA Hubble (Eds.), The heart and soul of change: Delivering what works in therapy (2nd ed., pp. 83–111). Washington, DC: American Psychological Association.