The Incredible Years program have been successfully transposed to other countries, particularly in Europe, where they have maintained their efficacy and effectiveness. The results of the first research in Portugal are encouraging.
Bibliography: Webster-Stratton, C., Gaspar, M.F., Seabra-Santos, M.J., 2012. Psychosocial Intervention. Vol.21.2. Guest Editor: Joaquin de Paul. Evidence-Based Programs for Children, Youth, and Families: Lessons from Outcomes and Cost-Benefits Evaluation.