Effectiveness of brief and standard school-based cognitive-behavioral interventions for adolescents with anxiety: a randomized non-inferiority study
Mowatt Haugland, Bente Storm et al.Journal of the American Academy of Child & Adolescent Psychiatry, Published online Janury 2020
This study compared brief (5 session) and standard (10 session) school-based and anxiety focussed cognitive behaviour therapy (CBT) with a waitlist control. The authors found that both forms of CBT were superior to the control therapy in terms of reducing anxiety symptoms (small-moderate effect size) and that standard CBT was better than brief CBT.
https://www.jaacap.org/article/S0890-8567(20)30001-0/fulltext?dgcid=raven_jbs_aip_email