“…The interpretation of findings from research on effectiveness training in psychotherapy are often challenging to understand due to their inherent limitations (e.g., difficulty implementing randomized clinical trials, influence and bias in interviewing for qualitative and survey studies, trainee-report of outcomes, retrospective studies). There is evidence that training and supervision can be effective for some outcomes, especially self-reported changes (e.g., Hill & Lent, 2006;Pascual-Leone et al, 2015;Smith & Trimble, 2016) and processbased variables (e.g., working alliance, helping skills; Hill et al, 2016). However, there is less evidence of the impact of training/supervision on client therapy outcomes (e.g., Erekson et al, 2017;Hill et al, 2016;Owen, Wampold, et al, 2016;Rousmaniere et al, 2016).…”