Beyond Usability: A UX Case Study on Using "Withdrawal Design" to Challenge Engagement Metrics in Social Robotics
2026-06-15 • Human-Computer Interaction
Human-Computer Interaction
AI summaryⓘ
The authors studied how children with autism interact with social robots at home over 8 weeks. They found that having the robot continuously helped reduce anxiety but also led to lower social motivation and smaller improvements in recognizing emotions compared to when the robot was taken away. Interviews showed that removing the robot sometimes encouraged kids to seek human interaction, whereas keeping the robot made social activities happen mainly just with the robot. The researchers suggest that success with social robots should be measured by how well they help children connect with people, not just how much they use the robot.
social robotsautismrandomized controlled trialanxietysocial motivationemotion recognitionusabilityuser experience researchhuman-robot interactionwithdrawal study
Authors
Yibo Meng, Qiuyu Long, Richard Chen, Yan Guan, Xiaolan Ding
Abstract
Social robots for children with autism are often evaluated through engagement and interaction quality, assuming the robot acts as a social scaffold. We report a mixed-methods "withdrawal" study that tests a harder question: what changes when the robot is removed. In an 8-week home-based randomized controlled trial (N=40), children either retained a consumer social robot (Qrobot) or had it withdrawn after initial use. Quantitatively, continued access reduced anxiety (SCARED/RCADS), yet was associated with lower parent-reported social motivation and weaker gains in emotion recognition (SMS/RMET) compared to withdrawal. Interviews with guardians contextualized this divergence: removal sometimes prompted children to seek human interaction, while continued use could keep social behavior siloed within the child-robot dyad, despite exceptionally high usability (SUS). We synthesize a UXR point of view: for vulnerable users, "engagement" can mask ecological downsides. Success should be judged not by retention, but by designed separation that bridges back to human relationships.