This randomised three-arm study aims to evaluate the efficacy and feasibility of a cognitive behavioral therapy (INT-Integrated Neurocognitive Therapy for Schizophrenia Patients) in the treatment of schizophrenia patients in an inpatient setting. The intervention will be compared with an active comparator (IPT- Integrated Psychological Therapy) and a control condition. Overall the study will include 90 patients (30 in each arm). Each patient will receive at least 16 sessions of the respective treatment. Baseline and follow up assessments up to 12 months after the intervention will investigate the stability of treatment.