Psychiatry Matters story - "Cognitive behavioral therapy (CBT) appears to be an effective adjunctive treatment for the positive symptoms associated with schizophrenia spectrum disorders, Swiss investigators report. Despite the proven effectiveness of antipsychotic drug treatments, a substantial proportion of people still experience treatment-resistant positive symptoms such as hallucinations, delusions, and feelings of being controlled by outside forces, note Gregoire Zimmermann and colleagues from the University of Lausanne. To investigate whether CBT as an adjunctive treatment could help to alleviate such symptoms, the team analyzed the results of 14 studies, involving 1484 patients with schizophrenia, schizoaffective disorder, or delusional disorder, and at least one positive symptom, published between 1990 and 2004. The chosen studies all included at least one CBT group compared with a control group."