“…In total, 13 data sets compared a group psychotherapeutic treatment to an active sham group [37,39,41,42,43,44,45,46,47,48,49,50,51], and 19 data sets compared a group psychotherapeutic treatment to TAU [7,12,13,34,40,41,52,53,54,55,56,57,58,59,60,61,62,63]. Thirty-one percent of the interventions were cognitive-behavioural approaches (including cognitive-behavioural social skills training and compensatory cognitive training), 19% came under the umbrella term ‘non-verbal arts therapies' (including music therapy, body-oriented psychotherapy and art therapy), and the remaining 50% included a range of therapeutic orientations such as cognitive remediation therapy, psycho-education and integrated approaches.…”