Cognitive Drill Therapy (CDT) aims at reducing stimulus bound anxiety specifically as seen in phobic disorders and Obsessive-Compulsive Disorders (OCD). CDT conceptualizes stimulus bound anxiety as having following four readily discernable components: (1) Objects of fear (2) Body-Mind Reactions (3) Safety Behaviours (4) Danger Thoughts. In short, these four components are called OBSD. An exposure to objects of fear triggers body-mind reactions which are painful to the individual and he/she engages in safety behaviours to get rid of the reactions. At the core of it lies the threat perception.