A Storytelling Robot for Pediatric Rehabilitation
Catherine Plaisant, Allison Druin, Corinna Lathan, Kapil Dakhane, Kris Edwards, Jack Maxwell Vice, Jaime Montemayor · 2000 · Proceedings of the Fourth International ACM Conference on Assistive Technologies (Assets '00) · doi:10.1145/354324.354338
Summary
This paper from the University of Maryland's Human-Computer Interaction Laboratory and AnthroTronix describes PETS (Personal Electronic Teller of Stories), a storytelling robot designed for pediatric rehabilitation. Children control a large furry robot using body-worn sensors (accelerometers embedded in armbands for the robot's arms, a hat for the head, and a shoe sensor for spinning), teaching the robot movements and emotions that can then be incorporated into stories written using storytelling software. The story is then "played" by the robot acting out the narrative. The project sits at the intersection of assistive technology and therapeutic intervention: rather than using technology solely to compensate for disability, PETS uses it as a motivating environment where children exercise muscles and joints (for physical rehabilitation) or reflect on stories and emotions (for developmental disabilities) through play. The design methodology is notable for involving children ages 7-11 as active design partners in an "intergenerational design team" — a cooperative inquiry approach where children participate throughout the technology development process, not just as end-user testers.
Key findings
A pilot study using AnthroTronix adaptive video game technology with children who had mild to moderate cerebral palsy showed promising results: over a 12-week period, range of motion with the game improved though no changes occurred in standard clinical measures, and parents reported that the children enjoyed using the system at home and felt it was safe. Design sessions with child partners revealed critical insights — children found the initial glove-based controller uncomfortable and the mapping between hand movements and robot motion confusing, leading to a redesign using embedded sensors in wearable accessories (armbands, hat, shoe) with direct correspondence between the child's body movement and the robot's movement. Two rehabilitation scenarios were developed: for physical therapy (e.g., a child with cerebral palsy does supination and pronation exercises that make the robot act out a story), and for developmental disabilities (e.g., a child with autism creates stories about emotions, with the robot expressing happy, sad, and angry). The sensors were designed with adjustable thresholds to match the amplitude of each child's movements, providing alternative switch access for children with limited motor control.
Relevance
This research demonstrated a creative approach to one of the persistent challenges in pediatric rehabilitation: maintaining children's motivation to perform repetitive therapeutic exercises. By embedding therapy in storytelling and robot play, the researchers transformed exercise from a clinical chore into an engaging creative activity. The cooperative inquiry methodology — treating children with and without disabilities as genuine design partners rather than passive subjects — was ahead of its time and influenced subsequent participatory design work in accessible technology. The dual application for both physical and developmental disabilities showed the flexibility of play-based therapeutic technology. The finding that a direct, intuitive mapping between body movement and robot movement was essential (children were confused by abstract mappings like wrist bending to control direction) has broader implications for designing embodied interactions for children with disabilities. This work anticipated the growing field of socially assistive robotics and therapeutic companion robots that has expanded significantly in the decades since.
Tags: assistive robotics · pediatric rehabilitation · therapeutic play · participatory design · cerebral palsy · developmental disabilities · children · cooperative inquiry