Table 1.

Study Inclusion Criteria and Rationale^a

Participants	Criteria	Rationale/Documentation
Children	1. Age 12–36 mo 2. Have a diagnosis of CP (including static encephalopathy) or be at risk of CP due to birth history and current developmental status 3. Be able to maintain a seated position with or without support 4. Be able to tolerate upright sitting with or without support while moving through space for 30 min	Assessed by caregiver report during screening Because early CP diagnosis varies based on access to health care specialists and presentation of the child, the research team is intentionally including children with signs and symptoms of CP in addition to children already diagnosed
Caregivers	1. Age 18 y or older 2. Be the legal guardian of the child participant and reside in the same household as the child 3. Must be able to communicate proficiently in English	Documented by researcher during phone and in-person visits To ensure safety of the child and effective communication by caregivers about their child’s use of devices in home environments

^a CP = cerebral palsy.