A number of recent studies have shown that individual cognitive-behaviour therapy can be effective in reducing the severity of psychotic symptoms in chronic treatment resistant schizophrenia. In addition, cognitive-behaviourally oriented family interventions have been shown to significantly reduce relapse in similar populations. However, the application of either individual or family CBT approaches has not been evaluated in people who have a psychotic illness and who also have intellectual disabilities. This paper describes how individual and family CBT for psychosis has been modified for people with a mild learning disability who have a diagnosis of schizophrenia and illustrates its use with five case studies. Copyright (C) 2004 John Wiley Sons, Ltd.