Interaction of Cognitive Distortions and Cognitive Deficits in the Formulation and Treatment of Obsessive-Compulsive Behaviours in a Woman with an Intellectual Disability.

Aims  This case study describes the formulation and cognitive–behavioural treatment (CBT) of obsessive–compulsive thoughts and behaviours in a woman with an intellectual disability. The report aimed to distinguish the cognitive deficits that reflect her disability from the cognitive distortions integral to her obsessive–compulsive disorder. Case study  Hence, we present one account of the cognitive–behavioural interventions aimed at correcting the cognitive distortions, and a separate account of the modifications necessary to compensate for specific cognitive deficits, which include impairments not only of ‘cognitive therapy skills’, but also of aspects of memory and executive functioning skills. Discussion  We suggest that this analysis may provide a rational approach to the problem of simplifying CBT to meet the needs of people with intellectually disabilities, by identifying more clearly the specific adaptations that are needed by a particular individual. We also discuss the assessment of cognitive deficits that might impact on CBT, and some implications of this approach for research and training.