The Association between Trainer Expertise and Changes in Adolescent Symptomatology in an Evidence-Based Family Prevention Programme.

Purpose: The aim of this study is to assess whether the outcomes of implementations of the Universal Strengthening Families Program (SFP 11-14) are linked to the competences or specific skills of the trainers of social field who gave them.

Method: The analyzed data was based on ratings awarded by the 174 mothers participating in the SFP 11-14. By conducting a K-means cluster analysis, significant groups were identified, based on the ratings awarded to the trainers.