Coordinated Thumb-index Interaction Using a Ring

2016.05 | CHI EA 2016

The thumb has the unique property of being opposable to the other fingers and is thus used to perform specific tasks such as grasping objects, which cannot be done otherwise. In this paper we present an interactive ring that takes advantage of this biomechanical advantage, by enabling thumb-index interaction. We propose a set of gestures involving the coordinated movement of the thumb against the proximal phalanx of the index finger that we call bi-digit interaction. Further, we present several scenarios where performing bi-digit interaction is quick, easy and advantageous for users.


bi-digit interaction, mobile computing, wearable computing, smartphone, joint interaction, ring


Proceedings of the 2016 CHI Conference Extended Abstracts on Human Factors in Computing Systems

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Sarthak Ghosh, Hyeong Cheol Kim, Yang Cao, Arne Wessels, Simon T. Perrault, and Shengdong Zhao