In a study of effectiveness of the Preventure Programme under real-world conditions, O’Leary-Barrett and her colleagues [74] described a procedure by which educational professionals were trained to implement the programme through a structured training protocol involving a 3-day workshop and two supervised practical sessions in which trainees delivered a two-session intervention to high-risk youth. Preventure trainers offered supervision and standardised feedback using a scale that was developed to evaluate adherence to 12 core treatment components of the personality-targeted intervention programme, such as goal setting and identifying and challenging automatic thoughts [73•]. The Cognitive Therapy Scale—Revised [75] and the Motivational Interviewing Treatment Integrity 3.0 [76] were also used to provide trainees with feedback on the quality of their therapy-specific skills. In this trial and subsequent trials, each trial facilitator must reach sufficient levels of programme delivery before running personality-targeted interventions with trial participants. This procedure is now used rather systematically to disseminate the programme to different communities around the world and has proven to be effective, not only in transferring skills to new clinical teams [74], but also leading to behavioural changes in young people [77], particularly if treatment fidelity is measured during programme implementation [51].