[Evidence-based psychotherapy of schizophrenic psychoses].

On the basis of the scientific state of knowledge it is outlined that psychotherapy is an important part of an efficacious and guideline-compliant treatment of schizophrenia. Firstly, aspects of the methodologically sound British National Institute for Health and Clinical Excellence (NICE) guidelines regarding the field of psychosis psychotherapy are presented in which cognitive behavioral therapy and family interventions are recommended without restrictions. Afterwards, empirically substantiated starting points for psychosis psychotherapy are described, taking particular account of the cognitive model of delusions. Furthermore, disorder-specific strategies of building the therapeutic relationship are identified, which take account of symptoms, such as mistrust or affective flattening. Finally, the evidence-based therapeutic strategies for relapse prevention and symptom reduction are delineated. In conclusion, psychosis psychotherapy does not have an evidence problem but an implementation problem.