What is obsessive compulsive disorder (OCD)?

Q1. Checking and rechecking if the door is lock or is the window is closed is called checking behaviour. For people suffering from obsessive compulsive disorder (OCD) this check and recheck can become debilitating. One theory is that this behaviour is caused by both the mood the person is in and the rule they have set to determine when to stop (Field, Miles & Field, 2012).