Compulsion Repetitive behaviors or mental acts that the individual feels driven to perform in response to an obsession or according to rules that must be applied rigidly. The behaviors or mental acts are aimed at preventing or reducing anxiety or distress or preventing a dreaded event or situation. However, these behaviors or mental acts are not connected in a realistic way with what they're designed to neutralize or are excessive. Copyright Notice Adapted from Wikipedia. Text is available under the Creative Commons Attribution-ShareAlike License 3.0 ; additional terms may apply.