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Journal Articles International Journal of Human-Computer Studies Year : 2023

Dual-Thumb Pointing and Command Selection Techniques for Tablets

Abstract

Tablets are often used as a distant input device to interact with large displays. Users can hold the tablet with two hands when interacting for a long time to avoid fatigue or dropping it. Still, most previous distant interaction techniques consider only one-handed tablets. This paper presents novel interaction techniques to perform distant pointing and command selection tasks using both thumbs while holding the device with two hands. In a first step, we design and evaluate six interaction techniques for distant pointing, based on using one or two thumbs, absolute or relative cursor control and single- or dual-precision pointing. Our results show that a combination of dual-thumb and relative pointing is preferred and more efficient than any other dual-thumb or single-thumb technique we designed. In a second step, we focus on command selection using two thumbs. We designed seven dual-thumb menu techniques based on quarter-pie or half-pie layouts, offering from 64 to 900 items. Our results show that using quarter-pie menu techniques is more efficient, usable and appreciated than using a linear or half-pie menu. Furthermore, we show that augmenting the number of items for quarter-pie and half-pie menu techniques has a low impact on command selection performance. In a third step, we compare our quarter-pie menus to bimanual marking menus. Our results show that quarter-pie menus are more efficient and less error-prone. We finally provide a set of lessons for designing efficient dual-thumb interaction techniques for two-handed tablets.
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Gary Perelman, Emmanuel Dubois, Marcos Serrano. Dual-Thumb Pointing and Command Selection Techniques for Tablets. International Journal of Human-Computer Studies, 2023, pp.103203. ⟨10.1016/j.ijhcs.2023.103203⟩. ⟨hal-04355332⟩
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