9 participants will be recruited from NHS psychological therapies services for people with psychosis in South London and Maudsley (SLAM) NHS Foundation Trust. Following a short baseline period they will receive up to 26 weekly sessions (about 6 months) of CFT with a clinical psychologist, and will provide interview and questionnaire research data at five different points during the study. At these assessment points, data will be gathered on participants' experiences, mood, perceptions of their position in the social world, and heart rate variability.