Emotional specificity of Sumbrella’s kinesic movements

Determine whether specific movements of the Sumbrella soft robotic hat reliably convey precise emotional states to observers, beyond general communicative intent, by assessing the emotional interpretability of its defined gestures when embodied as a wearable device.

Background

The paper introduces Sumbrella, a soft robotic wearable hat with three pneumatically actuated leaves and cable-driven shape morphing designed to express welcoming and withdrawal states through biomimetic kinesic gestures. The system uses computer vision for autonomous reactive behaviors and allows manual overrides, aiming to explore how soft robotic movement on the body can serve as a form of social communication.

In the user study, participants generally understood the device’s overall communicative intent and responded positively to its biomorphic aesthetics and motions. However, the authors note uncertainty regarding whether specific movements (e.g., sweeping back or puffing motions) communicated precise emotional states. This highlights an unresolved question about emotional granularity in the interpretation of soft robotic kinesics when integrated into human–robot wearable hybrids.