Strengthening the evidence base for humanitarian interventions that provide psychosocial support to war-affected youth is a key priority. We tested the impacts of an 8-week programme of structured activities informed by a profound stress attunement (PSA) framework (Advancing Adolescents), delivered in group-format to 12–18 year-olds in communities heavily affected by the Syrian crisis. We included both Syrian refugee and Jordanian youth. (Description from source)