Using patient‐reported outcome measures to improve service effectiveness for supervisors: a mixed‐methods evaluation of supervisors' attitudes and self‐efficacy after training to use outcome measures in child mental health
1. East Haringey IAPT, Whittington Health NHS Trust, London, UK;2. Evidence Based Practice Unit, UCL and the Anna Freud Centre, London, UK;3. The Anna Freud Centre, London, UK;4. Common Room Consulting Ltd., London, UK