Obsessive Compulsive Disorder (OCD) is made up of unwanted and intrusive thoughts (obsessions), which often cause a lot of anxiety, and repetitive behaviours that aim to reduce the anxiety caused by obsessions. Research in our lab has focussed on many different aspects of OCD, from inhibition in OCD and OCD-related disorders (such as trichotillomania and excoriation disorder) to comparing the cognitive profiles of OCD and related disorders.