Bimanual Input for Tablet Devices with Pressure and Multi-Touch Gestures

In this paper we present the results of a study investigating the control of simultaneous non-dominant hand (NDH) pressure input and dominant hand (DH) pinch, swipe and rotate gesture input on a touchscreen tablet device. We investigate the effect of NDH pressure input on DH gesture accuracy, and vice versa, to support the design of bimanual interaction techniques for tablet devices. Our results suggest that pressure negatively affects DH touchscreen gesture performance; however, pressure targeting accuracy for each gesture was still high (86% overall). Our results show that participants were able to achieve high levels of accuracy using DH swipe gestures (the simplest gesture in the study) suggesting that the ability to perform a simultaneous combination of pressure and touchscreen gesture input depends on the complexity of the dominant hand action involved.