Abstract
This paper provides an overview of the theoretical framework of the Psychological Sciences' reviews and describes how improved psychological research can foster our understanding of mental health and mental disorders in a complementary way to biomedical research. Core definitions of the field and of psychological interventions and treatment in particular are provided. The work group's consensus regarding strength and weaknesses of European Union (EU) research in critical areas is summarized, highlighting the potential of a broader comprehensive "Behaviour Science programme" in forthcoming programmatic EU funding programmes.