for entry into the study, the following criteria must be met:

men and women, ages 18 to 60 years, inclusive.

a diagnosis of schizophrenia or schizoaffective disorder according to icd-10 classification.

having at least two psychiatric hospitalization for psychosis before the study enrollment.

severity (cgi-s) ≤ 3 at study visit 1.

all patients must be on stable doses of antipsychotic medication during the study entry.

organic mental disorder,

mental disorder due to psychoactive substance use or mental retardation.

participation in another relapse prevention program.

hayward compliance rating scale score < 2 at visit 1.