MyoTilt

Abstract

We present the MyoTilt target selection method for smartwatches, which employs a combination of a tilt operation and electromyography (EMG). First, a user tilts his/her arm to indicate the direction of cursor movement on the smartwatch; then s/he applies forces on the arm. EMG senses the force and moves the cursor to the direction where the user is tilting his/her arm to manipulate the cursor. In this way, the user can simply manipulate the cursor on the smartwatch with minimal effort, by tiling the arm and applying force to it. We conducted an experiment to investigate its performance and to understand its usability. Result showed that participants selected small targets with an accuracy greater than 93.89%. In addition, performance significantly improved compared to previous tilting operation methods. Likewise, its accuracy was stable as targets became smaller, indicating that the method is unaffected by the "fat finger problem".