On the basis of the Family System Test (FAST), family representations of parents with healthy and biopsychosocially distressed children were compared, and family structure changes in the context of interventions on the parent-level were described. Results indicated that parental family constructs are related to offspring's health and clinical intervention. Parents of psychiatric patients showed their families to have low cohesion, and hierarchically unclear generational boundaries (i.e. unbalanced structure). As had been their wish at therapy onset, the family patterns they indicated after completion of treatment were balanced.