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Handbook of Psychotherapy and Behavior Change: The Handbook of Psychotherapy and Behavior Change is perhaps the most important compendium of psychotherapy research covering a large number of research areas. The Handbook is updated approximately every 10 years, and the most recent 6^th edition was published in January 2013. In the coming months I will review one chapter a month in addition to commenting on psychotherapy research articles. Book chapters have more restrictive copy right rules about distributing content, so I will not provide author email addresses for these chapters. If you are interested, you can view the table of contents on Amazon.

Lambert, M.J. (2013). The efficacy and effectiveness of psychotherapy. In M.J. Lambert (Ed.) Bergin and Garfield’s handbook of psychotherapy and behaviour change (6^th ed.), pp169-218. Hoboken, N.J.: Wiley.

This comprehensive chapter in the Handbook reviews research on the efficacy and effectiveness of psychotherapy. Lambert’s reviews focus on meta-analyses, which is a way of summarizing effect sizes in a research area. The bottom line is that psychotherapy is effective so that 40% to 60% of clients show substantial benefit in controlled research trials, though the effect is likely smaller in routine practice.  Concurrently, a consistent proportion of adults (5% to 10%) deteriorate during psychotherapy. Patients who receive formal treatment are better off than those who receive no treatment, and bona fide treatments are superior to control conditions that provide only some aspects of effective treatment. When psychotherapy is offered by skilful therapists, on average clients experience appreciable gains and return to normal functioning. Fifty percent of patients achieve clinically significant gains after 8 sessions, and 50% achieve recovery after about 20 sessions of psychotherapy. The effects of psychotherapy tend to be long lasting. For example, only 25% treated depressed patients relapse, whereas 50% of those who receive antidepressants relapse. Research continues to support those therapies that have been rigorously tested, and differences in effectiveness between therapy types (e.g., cognitive behavioural therapy (CBT), psychodynamic, interpersonal, etc.) tend to be small or negligible for many disorders. Cognitive behavioural therapy is still the most tested therapy modality, though other treatments are also accumulating evidence of efficacy. Treatment is likely facilitated by a therapeutic relationship that is characterized by trust, understanding, acceptance, kindness, and warmth. The effect of the therapist providing the therapy is at least as large as the effect of different therapy techniques. That is, some therapists are unusually effective, whereas others may not help the majority of patients who seek their services. Continuous monitoring of outcomes and providing regular feedback to the therapist improves the therapy’s effectiveness.

Practice Implications

Providers and patients can be assured that a broad range of formally defined and tested psychotherapies when provided by skilful therapists are likely to result in appreciable gains in clients including a return to normal functioning. Therapy relationships characterized by trust, understanding, acceptance, and warmth can greatly facilitate change in depression, anxiety, inadequacy, and inner conflicts. When making a decision about which therapy to choose, clients would be wise to consider the therapist as a person at least as much as the type of therapy being offered. Treatment efforts should be based on the best evidence available for treatment types, therapist behaviors, and relationship factors. Routinely monitoring the effects of therapy with each patient will give the therapist ongoing information about their effectiveness and may improve their patients’ outcomes.

Town, J. M., Diener, M. J., Abbass, A., Leichsenring, F., Driessen, E., & Rabung, S. (2012). A meta-analysis of psychodynamic psychotherapy outcomes: Evaluating the effects of research-specific procedures. Psychotherapy, 49, 276-290.

One of the main reasons that some clinicians do not participate in research is that they argue that doing so will have a negative impact on the therapeutic relationship, the therapy process, and patient outcomes. Although I have heard this from clinicians of many theoretical orientations, this opinion is perhaps most strongly held by some colleagues with a psychodynamic orientation. I identify with psychodynamic theory and practice, so this opinion about research held by some of my colleagues has been very disconcerting to me. Up to now, the best I could say in defense of practice-based research of psychodynamic therapy was to talk about my own experiences, which have been highly positive and rewarding. A recent meta analysis by Town and colleagues from Dalhousie University changes all that. (First, a note about meta analysis. Meta analysis is a statistical way of combining the effects of many studies, each of which has a number of participants, into a common metric called an effect size. By combining studies, the end result is more meaningful and more reliable than the results of any single study on its own.). The meta analysis by Town and colleagues had 45 independent samples and over 1600 patients. Results indicated that psychodynamic treatments for a variety of disorders (e.g., depression, anxiety, personality disorders) showed a significant large positive treatment effect – this is not new. What is new is that compared to conditions in which no research-specific protocols were introduced, conditions that did use research protocols were no different in terms of patient outcomes up to one year post treatment. There was even a significant small positive effect of these research protocols on outcomes from post treatment to one year post treatment. Research-specific protocols included video recordings of therapy sessions, therapists following treatment manuals, fidelity checks to make sure therapists were accurately doing psychodynamic therapy, and psychometric measurements of processes and outcomes

Practice Implications

Research protocols do not have a negative impact on psychodynamic therapy outcomes. Perhaps research protocols should be introduced into all therapies to improve longer term outcomes in addition to studying therapy procedures and processes that work.

Author email: joel.town@dal.ca

Oldham, M., Kellett, S., Miles, E., & Sheeran, P. (2012). Interventions to increase attendance at psychotherapy: A meta-analysis of randomized controlled trials. Journal of Consulting and Clinical Psychology, 80, 928-939.

A great deal of clinical time can be wasted because of patient nonattendance at scheduled psychotherapy appointments. The financial costs of nonattendance are also high, and patients who need help but do not attend are not receiving help. Premature termination from psychotherapy is associated with poor outcomes. Previous reviews reported that premature termination rates in regular clinical practice ranged from 40% to 46.8%. Clearly this is a big problem for many psychotherapists and patients. Oldham and colleagues (2012) conducted a meta analysis of interventions to increase psychotherapy attendance. Their meta analysis included 33 randomized controlled trials (RCTs) representing 4422 patients. Interventions had a significant moderate effect on reducing premature termination and increasing attendance. Effective interventions included: giving patients a choice of appointment times, giving patients a choice of therapists, motivational enhancement interventions, preparing patients prior to psychotherapy on what to expect, attendance reminders, and providing information on how to make the best use of therapy. Participants with single diagnoses made better use of interventions than those with multiple diagnoses.

Practice Implications

Psychotherapists can improve attendance in psychotherapy by providing patients with choice of appointment times and therapists, by taking the time to prepare patients prior to therapy for what to expect in treatment and how to best make use of therapy, using motivational interventions, and by providing appointment reminders.

Author email: s.kellett@sheffield.ac.uk or p.sheeran@sheffield.ac.uk