Semantic pointing: Improving target acquisition with control-display ratio adaptation. In 13th International Conference on Human-Computer Interaction with Mobile Devices and Services. The effects of walking speed on target acquisition on a touchscreen interface. International Journal of Mobile Human Computer Interaction (IJMHCI) 5, 3 (2013), 42-61. Escape-keyboard: A sight-free one-handed text entry method for mobile touch-screen devices. The effects of tree-view based presentation adaptation on mobile web browsing. This study provides novel research contributions to mobile HCI, advancing the design of soft keyboards for one-handed interaction with mobile devices and mobile accessibility. ThumbStroke shows advantages in typing accuracy and user perceptions in comparison to the Escape and QWERTY keyboards and results in faster typing speed than QWERTY in sight-free and one-handed text entry. We empirically evaluated ThumbStroke through a 20-session longitudinal controlled lab experiment.
It does not require physical press on any specific keys, thus eliminating the need for visual attention and reducing errors due to tiny key size, fat thumbs, limited thumb reachability, and visual occlusion. Text entry via ThumbStroke completely relies on the directions of thumb strokes at any place on the screen of a mobile device. We propose a thumb-stroke-based keyboard, ThumbStroke, to support both sight-free and one-handed text entry. The QWERTY keyboard on mobile devices usually requires users’ full visual attention and both hands, which is not always possible.
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