sense of relief and that even though their compulsive rituals lose the ability to provide relief over time, the patients continue to perform the behaviors [38]. Further support for this hypothesis comes from experimental studies, which report excessive habit formation and/or an over-reliance on habitual behavior at the expense of flexible goal-directed behavior on experimental tasks in OCD [90–91], as well as in other disorders characterized by compulsive behavior including TS [92–93].
