From positive youth development to youth's engagement : the dream teens
In addition to the empirical validation of 'health and happiness' determinants, theoretical models suggesting where to ground actions are necessary. In the beginning of the twentieth century, intervention models focused on evaluation and empirical validation were only concerned about overt behaviours (verbal and non-verbal) and covert behaviours (cognitions and emotions). Later on in the middle of the century, there was a shift from treating the problems to a positive approach, focused on promoting assets and individual strengths. Thus, the role of social competences, self-regulation and resilience became salient. Researchers also highlighted the importance of social cohesion and social support, as active health and wellbeing facilitators. More recently, in the twentyfirst century, the population's engagement (positive engagement) has become crucial. This paper presents the evolution of this theoretical and scientific path, using Portugal as a case study, where early interventions focused on the positive aspects of both covert and overt behaviours, while more recent interventions included explicitly the perspective of youth engagement and participation, as is the case of the Dream Teens Project. It is expected that the political and professional understanding of this trajectory will allow professionals to provide better health and educational services, improving young people's engagement, quality of life, health and wellbeing ; peer-reviewed