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Augusto Esteves, Elizabeth Bouquet, Ken Pfeuffer, Florian Alt
One-Handed Input for Mobile Devices via Motion Matching and Orbits Controls
Proceedings of the ACM on Interactive Mobile Wearable and Ubiquitous Technologies. October 20, 2022. Association for Computing Machinery, New York, NY, USA. (bib)

We introduce a novel one-handed input technique for mobile devices that is not based on pointing, but on motion matching -where users select a target by mimicking its unique animation. Our work is motivated by the findings of a survey (N=201) on current mobile use, from which we identify lingering opportunities for one-handed input techniques. We follow by expanding on current motion matching implementations - previously developed in the context of gaze or mid-air input - so these take advantage of the affordances of touch-input devices. We validate the technique by characterizing user performance via a standard selection task (N=24) where we report success rates (>95%), selection times (~1.6 s), input footprint, grip stability, usability, and subjective workload - in both phone and tablet conditions. Finally, we present a design space that illustrates six ways in which motion matching can be embedded into mobile interfaces via a camera prototype application.