This study tried to figure out if parents initial treatment motivation influenced their final assessment of the treatment process and its outcome in child psychiatry. We evaluated parents therapy motivation by developing a questionnaire based on solution focussed therapy's conception of motivation of clients (Berg 1992). The change during the treatment in parents satisfaction with their life situations and their experience of pressure ("life quality")--independent from their pronounced assessment of the quality of therapy--was taken as one indication of treatment quality. In addition to this parents' assessment of treatment was investigated by a questionnaire for therapy evaluation which included process and outcome quality factors. There could be shown that significant relations existed. Therefore we are convinced that the discussion of quality assurance in child psychiatry should be enlarged with a methodical conception of therapy motivation and the assessment of life quality of parents in addition to the evaluation of their specific therapy satisfaction.