The majority of mobile applications use built-in touchscreens and/or accelerometers to provide direct ways for user inputs. Yet, the need to manipulate the device itself (e.g. touch, tilt) poses usability issues such as occlusion and inaccuracy. To address these issues, research proposed using the built-in magnetometer and magnets to facilitate around-device in-teractions. However, there is little evaluation in how this technique impacts performance and user experience beyond simple docking tasks. To fll this gap, we explored the mobile gameplay context by implementing an interface that uses ro-tatory gestures from a magnetic ring as input, and compared two control mappings (angular and linear) with touch and tilt in a usability study using a mobile game. We found that rotatory gestures with the ring, when mapped to angular controls, were on par with touch and superior over tilt, and engendered greater gameplay experience and sense of map-ping. Based on our fndings, we discuss implications of using this technique for gameplay, as well as other applications.




JoyHolder: Tangible Back-of-Device Mobile Interactions

Amit Yadav, Alexander Keith Eady, Sara Nabil, Audrey Girouard

ACM International Conference on Interactive Surfaces and Spaces, ISS 2019, 2019


Tangible Around-Device Interaction Using Rotatory Gestures with a Magnetic Ring

Victor Cheung, Audrey Girouard

Mobile HCI, 2019


Exploring Around-Device Tangible Interactions for Mobile Devices with a Magnetic Ring

Victor Cheung, Audrey Girouard

ACM Conference on Tangible, Embedded and Embodied Interactions TEI 2018, 2018