The 18-week caregiver-delivered intervention involves daily 30-minute home-practice and weekly sessions with a therapist over video call or in-person at a local rehabilitation centre. During weekly sessions, the therapist will coach the caregiver(s), problem-solving with them and supporting their autonomy as agents of change in their child's care. The first 13-weeks of the program will be exclusively constraint-induced movement therapy, with bimanual therapy introduced in the last five weeks depending on child age. Intervention content will be individualized based on child age, ability, and interests.

Satisfaction with the intervention will be assessed using a study-built questionnaire with Likert-scale response options 0 to 4, with 4 being greater satisfaction.

Using the COPM, three to five individualized functional goals will be identified by caregivers and then scored on a scale of 1 to 10 for both Performance and Satisfaction.

The HAI/mini-AHA/AHA employ a video-recorded play-based session of <15 minutes to provide a logit-based measure of manual function.

Using the COPM, three to five individualized functional goals will be identified by caregivers and then scored on a scale of 1 to 10 for both Performance and Satisfaction.