can help to reduce symptoms = CHADWICK = case study on a man (NIGEL) who had delusions. during CBT sessions, the therapists used reality testing with with NIGEL and he was asked to prove his ability by predicting what people were about to say in 50 different videotaped scenarios. NIGEL didnt get any correct, this changed his perception/delusion that he could predict what people were about to say = shows that techniques can help manage +ve symptoms of sz