Obsessive-Compulsive Disorder

The Different Types of Obsessive-Compulsive Disorder
http://www.ocduk.org/types-ocd

Symptoms of obsessive compulsive disorder (OCD)
http://www.nhs.uk/Conditions/Obsessive-compulsive-disorder/Pages/Symptoms.aspx

Obsessive-Compulsive Disorder (OCD) Screening Quiz
http://psychcentral.com/ocdquiz.htm