This paper is the first of two presenting the development of a model for th
e description of intensive family therapy. This work is carried out context
ually in a national quasi-experimental multi-centre study in Sweden on trea
tment and follow-up results of 109 families undergoing intensive family the
rapy. This form of family therapy is most used within child psychiatric set
tings. Intensive family therapy can be described as a full-day treatment pr
ogramme for families by a therapeutic team and including both family interv
iews and family work in a therapeutic milieu, preceded by a planning and a
preparational period and often followed by a shorter or a longer period of
outpatient work. In this paper the treatment ideology and supposed critical
organizational elements of intensive family therapy an introduced. A theor
etical model for description of intensive family therapy is presented.