The effectiveness of third wave cognitive behavioural therapies for children and adolescents: A systematic review and meta-analysis.

OBJECTIVES: Third wave cognitive behavioural therapies are increasingly used with children and adolescents. This meta-analysis aimed to determine the effectiveness of four third-wave interventions (acceptance and commitment therapy, compassion focused therapy, mindfulness-based cognitive therapy, and metacognitive therapy) for youth. METHODS: Four electronic databases were used to identify randomized controlled trials, which tested effects related to health, well-being and functioning. Sensitivity analyses considering study quality were conducted and moderators were explored. RESULTS: The results based on 50 RCTs meeting inclusion criteria indicated emotional symptoms/internalizing problems (g = -.68, 95% CI -.98 to -.37, k = 43, N = 3265), behavioural difficulties/externalizing problems (g = -.62, 95% CI -1.01 to -.22, k = 23, N = 1659), interference from difficulties (g = -.46, 95% CI -.87 to -.05, k = 21, N = 1786), third wave processes (g = .39, 95% CI .17 to .62, k = 22, N = 1900), wellbeing/flourishing (g = .76, 95% CI .35 to 1.17, k = 21, N = 1303) and physical health/pain (g = .72, 95% CI .01 to 1.44, k = 9, N = 1171) yielded significant effects. Effect for quality of life (g = .62, 95% CI -.08 to 1.31, k = 12, N = 1271) was non-significant. When analysing only those studies rated moderate-high quality, third wave interventions yielded significant superiority effects compared to controls for emotional symptoms/internalizing problems (g = -.55, 95% CI -.82 to -.27, k = 28, N = 2110), interference from difficulties (g = -.48, 95% CI -.90 to -.05, k = 21, N = 1605), third wave processes (g = .27, 95% CI .11 to .43, k = 18, N = 1692), well-being/flourishing (g = .50, 95% CI .18 to .81, k = 16, N = 1063), and quality of life (g = .32, 95% CI .04 to .60, k = 10, N = 1212). Behavioural difficulties/externalizing problems (g = -.38, 95% CI -.86 to .10, k = 15, N = 1351) and physical health/pain (g = .52, 95% CI -.14 to 1.17, k = 8, N = 1139) ceased to be significant. Widespread heterogeneity raised concerns about generalizability and follow-up data was relatively sparse. CONCLUSIONS: This meta-analysis finds promising results for use of third wave CBT with youth, though the review has limitations.

An enhanced psychological mindset intervention to promote adolescent wellbeing within educational settings: A feasibility randomized controlled trial.

OBJECTIVE: This randomized controlled trial feasibility study aimed to investigate a single-session mindset intervention, incorporating third-wave constructs, within educational settings as a universal tool to promote emotional wellbeing. METHOD: Eighty adolescents (age M = 16.63) were randomized to the 30-min computer intervention or a usual curriculum waitlist. Outcome measures were administered at baseline, posttreatment, 4-week, and 8-week follow-ups. RESULTS: Student feedback about the intervention and trial procedure was mainly positive. Participants engaged with the intervention content and data were suggestive of possible small-large intervention effects for targeted mechanisms of personality mindset and psychological flexibility. Between-group differences over time across wellbeing outcomes of self-compassion, self-esteem, low mood, and anxiety also yielded some promising results, though assessments of reliable change were less clear. No harm was reported. CONCLUSIONS: The intervention and study design were deemed feasible, though areas for improvement were noted. A full-scale trial to determine effectiveness is warranted.