Clinical Research Directory

Inclusion Criteria: * Adults, 18 - 65 years of age. * Patient affiliated to health insurance * Inpatients and outpatients with DSM-5 diagnosis of schizophrenia spectrum disorder. * Presence of positive symptoms at inclusion (PANSS delusions, suspiciousness or grandiosity ≥3). * Stable condition with no expected changes in medication or symptoms during the last 3 months (information from clinical services, note that stable condition includes lack of suicidality). * Patient providing informed consent. Exclusion Criteria: * Having received MCT in the previous year. * Neurological disorder, or severe medical condition other than psychosis * A score above 5 in the "Hostility" and the "Suspiciousness" items of the PANSS Positive subscale (to preserve group dynamics). * Patient considered by his psychiatrist to be at serious risk of harm to self or others (e.g. previous aggressive or suicidal behaviors) * Patient in an exclusion period defined by another research protocol * Patient involved in another Investigational Medicinal Product trial * Patient under guardianship (i.e. French "tutelle") * Patients deprived of freedom because of a judicial measure.