Table 1.

Process evaluation parts, areas of research, explanatory data, and outcomes.

Research questions	Process evaluation components	Explanatory data	Outcomes
Part 1. Intervention implementation (What is implemented and how?)	Fidelity of implementation Dose of intervention delivered Adaptations Reach	Therapist contact (N=112) Intervention engagement (N=112) Usage metrics (N=112) Clinician (n=6), children and parent (n=20), and therapist (n=4) interviews	Engagement and satisfaction with the intervention
Part 2. Mechanisms of impact (How does it produce change?)	Mediators and moderators Unexpected pathways and consequences	Usage metrics Therapist contacts Clinician, children and parent, and therapist interviews	Relationship between engagement with the intervention and change in tic severity
Part 1 and 2. Context (How do factors external to the intervention affect intervention implementation and change?)	Factors related to fidelity of delivery (part 1) and improvement in tics (part 2)	Demographic data Clinician, children and parent, and therapist interviews Comorbidities Baseline severity of tics	Engagement with the intervention (part 1) Change in tic severity (part 2)