Participants in this double blind study will be randomly assigned to receive either CBT plus HRT or standard care, which will consist of psychoeducation and supportive therapy. All participants will partake in 8 sessions of their assigned therapy over the course of 10 weeks. After the initial 10 weeks, those who responded to treatment will report back to the study site for 3 monthly booster sessions. Changes in tic severity, effects of the therapies on overall functioning and quality of life, and possible predictors of treatment outcome will be assessed.