Investigating Current Techniques for Opposite-Hand Smartwatch Interaction Frederic Kerber1 Tobias Kiefer2 Markus Lochtefeld¨ 3 Antonio Kruger¨ 1 1German Research Center for Artificial Intelligence (DFKI) and 2Saarland University Saarland Informatics Campus, Saarbrucken,¨ Germany 3Department of Architecture, Design and Media Technology, Aalborg University, Aalborg, Denmark
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[email protected] ABSTRACT The small display size of smartwatches creates a challenge for touch input, which is still the interaction technique of choice. Researchers and producers have started to investigate alterna- tive interaction techniques. Apple and Samsung, for example, introduced digital versions of classic watch components such as the digital crown and the rotatable bezel. However, it re- mains an open question how well these components behave in terms of user interaction. Based on a self-built smartwatch prototype, we compare current interaction paradigms (touch input, rotatable bezel and digital crown) for one-dimensional tasks, i.e. scrolling in a list, two-dimensional tasks, i.e. naviga- tion on a digital map, and a complex navigation/zoom task. To check for ecological validity of our results, we conducted an additional study focusing on interaction with currently avail- Figure 1. Smartwatch prototype consisting of our 3D-printed housing able off-the-shelf devices using our considered interaction including the mechanical components for the digital crown and the paradigms. Following our results, we present guidelines on rotatable bezel, a Moto 360 and the attached Raspberry Pi B+. which interaction techniques to use for the respective tasks. ACM Classification Keywords H.5.2 Information interfaces and presentation (e.g., HCI): User wrist and the forearm are most the desirable areas for wearable Interfaces devices [31].