Therapist Training and Supervision in Clinical Trials: Implications for Clinical Practice

Researchers in clinical trials usually pay close attention to therapist selection, training, supervision and monitoring, but the extent of this input has not been systematically documented. Aims: To describe the extent of training and supervision activity within clinical trials, and to consider any implications for transporting therapies from research to routine clinical contexts. Method: Twenty-seven randomized studies examining the efficacy of CBT interventions for people with depression or anxiety disorders were selected on the basis of their quality and impact on the field. Published and unpublished sources were used to gather information about therapist selection, training and supervision within these trials. Results: The review identified the extent of investment by researchers in assuring therapist expertise, adherence and competence. It also indicated inconsistencies in the clarity with which this input was reported. Conclusions: The ubiquity of intervention-specific training in research contexts risks being overlooked when commissioning evidence-based therapies in routine practice. This has clear implications for the likely effectiveness of interventions. Greater consistency in the reporting of training in clinical trials may help to draw attention to the role of training and supervision in maximizing clinical outcomes.