This paper is a review of studies on psychological treatments for positive psychotic symptoms, and a detailed description of two of these studies, the Manchester Symptom Project, which aimed to decrease positive symptoms by training patients in effective coping strategies, and the Liverpool Auditory Hallucination project, which aimed to provide a cognitive-behavioural treatment for individuals with persistent and distressing voices. The results from these studies indicate that enduring positive symptoms which have not responded to neuroleptic medication can be effectively treated by psychological methods.