Fig. 1From: Protocol for the Process Evaluation of the Online Remote Behavioural Intervention for Tics (ORBIT) randomized controlled trial for children and young peopleSchedule of ORBIT and process evaluation procedures. *t1, mid-treatment (3 weeks); t2, mid-treatment (5 weeks); t3, primary end point (3 months); t4, 6 months; t5, 12 months; t6, 18 months; YGTSS, Yale Global Tic Severity Scale; TTSS, Total Tic Severity Score; ERP, exposure and response preventionBack to article page