Utility and stability of the Basic Personality Inventory in psychiatric patients with longstanding psychotic disorders in a new Psychiatric Rehabilitation program over a two-year period

34 long-term psychiatric patients with psychotic-type diagnoses, participat ing in a Psychiatric Rehabilitation program. completed the Basic Personalit y Inventory 5 times at 6-mo. intervals. In comparison a with normative data , participants had statistically significant (p < .01) higher means at Time 1, indicating greater reported psychopathology on all scales except Interp ersonal Problems. Program participants also showed greater impairment than a heterogeneous group of 112 psychiatric patients, with statistically highe r means on die scales of Denial, Persecutory Ideas, Thinking Disorder, anti Self-depreciation, No statistically significant differences were found fur sex, time, or their interaction. Correlations indicated high stability in the scale scores over time. Considerable stability in test scores over lime does not indicate lack of program success but reflects stability maintenan ce goals and processes in patients with longstanding psychotic disorders.