What do we know about the effect of bringing the family into treatment?

In Sweden of today, the interventions in social welfare and psychiatric care should be grounded on the perspective of evidence based methods. The most valued evidence comes from repeated research about the effectiveness of family therapy. This will be presented for different problems where family therapy has been used, and for research about the effectiveness of different sorts of family therapy schools. Other topics in the article are analysis of cost benefits in an American health system for family therapy and the importance of family therapy as an extra treatment.