Evaluation of the Effectiveness of a Promotion and Prevention Project in Child and Youth Mental Health. HENKA: Growing in Emotional Well-being
Evaluation of the Effectiveness of a Promotion and Prevention Project in Child and Youth Mental Health. HENKA: Growing in Emotional Well-being
HENKA is a universal, whole-community, school-based program that aims to promote emotional well-being and prevent mental health problems among adolescents enrolled in 1st to 3rd year of Secondary Education (ESO) in Catalonia, Spain (approximately 12 to 16 years old), through the development of resilience. The programme's name takes its origin from the Japanese term Henka, meaning a positive and transformative change, reflecting its focus on fostering sustainable improvements in adolescents' socioemotional functioning.The program targets adolescents, their families and school professionals. Its effectiveness is being evaluated through a non-randomized, two-arm, cluster-controlled quantitative phase (intervention schools compared to control schools), combined with a qualitative phase using focus groups. The study builds on the HENKA Pilot study (Ethics Committee code PIC-85-22), which assessed the feasibility of the evaluation process, including the validity of the assessment instruments and participants' viability and acceptability, before scaling up the program to a larger population.
The quantitative phase uses school-level cluster sampling: recruitment was coordinated with the Department of Education and the Department of Health of the Government of Catalonia, and schools voluntarily enrolled in either the HENKA intervention group (target at least 100 schools) or the control group (target at least 25 schools), depending on whether they formalized full participation in the program or chose to take part in the evaluation component only. The first-year secondary school cohort served as the sampling cluster, with additional cohorts progressively enrolled across successive academic years, starting in 2023-2024, until the target sample size was reached; each cohort was followed longitudinally until the third year of secondary school. The intervention comprises student training, consisting of eight approximately 55-minute classroom sessions covering self-efficacy/self-esteem, emotional self-regulation, assertiveness, interpersonal skills, and mindfulness. This training is delivered by teachers during school hours, and the teachers have previously received training from specialist staff (train-the-trainer program). In some sessions, teachers are accompanied by Community Emotional Well-being Representatives (RBEC), health professionals provided by the Department of Health who support classroom delivery and help identify and manage mental-health-related situations among students. Families attend parent workshops. Control schools continue with their usual mental health talks and resources and are offered the HENKA materials after the study ends. Results are assessed through validated online questionnaires (Research Electronic Data Capture, REDCap) at up to six time points over three academic years. A sample size calculation performed a priori with G*Power 3.1.9.7 (effect size 0.2, alpha 0.05, power 0.95) indicated a minimum of 1,084 participants (542 per control and intervention group). In addition, a qualitative phase is conducted through focus groups with each participant segment (adolescents, families, educational professionals, and key regional well-being stakeholders from the Wellbeing for Being Well Program (BxB), the Community Emotional Well-being Representatives program (RBEC), and the Health and School Program (PSiE), held during the second and third trimesters of the 2024-2025 and 2025-2026 academic years, to explore participants' experiences and perspectives on the HENKA program.
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