A course of therapy is recommended for individuals with obsessive-compulsive disorder (OCD). It is usually a type of cognitive behavioural therapy (CBT) with exposure and response prevention (ERP).~In this study the investigators assess patients pre-therapy and post-therapy evaluating symptom severity (measured by the Y-BOCS) and decision-making (measured by online questionnaires and computer-based behavioural tasks).~To examine how decisions are formed in patients undergoing OCD CBT, how behaviour changes after a non-pharmacological therapy module and how it is associated to the alleviation of OCD symptoms.~The study, which will recruit 90 patients, is based at University College London - Wellcome Centre for Human Neuroimaging. This study is a part of the Cognitive and Neural Networks in Psychiatry (CNNP) study.
The aim of this study is to understand why patients with obsessive-compulsive disorder (OCD) fail in therapy.~To understand the neural mechanisms involved in exposure therapy that support success and clinical improvement in order to improve therapy outcomes for OCD patients.