Exploring the Design Space of Bezel-Initiated Gestures for Mobile Interaction

Exploring the Design Space of Bezel-Initiated Gestures for Mobile Interaction

Wing Ho Andy Li, Kening Zhu, Hongbo Fu
Copyright: © 2017 |Pages: 14
DOI: 10.4018/IJMHCI.2017010102
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Bezel enables useful gestures supplementary to primary surface gestures for mobile interaction. However, the existing works mainly focus on researcher-designed gestures, which utilized only a subset of the design space. In order to explore the design space, the authors present a modified elicitation study, during which the participants designed bezel-initiated gestures for four sets of tasks. Different from traditional elicitation studies, theirs encourages participants to design new gestures. The authors do not focus on individual tasks or gestures, but perform a detailed analysis of the collected gestures as a whole, and provide findings which could benefit designers of bezel-initiated gestures.
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Bezel-Initiated Interaction

A number of researches revealed the advantages of bezel-initiated gestures for mobile interaction. For example, Roth et al. (Roth & Turner, 2009) introduced Bezel Swipe for secondary actions like multi-target selection, copying and pasting. It was a simple single-finger swipe from the bezel towards the center of the touchscreen. They evaluated its usefulness in the context of image selection. Their participants found it to be a viable alternative to direct touch selection.

Bragdon et al. (Bragdon et al., 2011) prototyped Bezel Marks and Bezel Paths, which were single-finger gestures that start from the bezel, followed by mark-based and free-form path gestures, respectively. They found that bezel-initiated gestures were more resistant to situational impairments than soft-button-based interfaces. Serrano et al. (Serrano, Lecolinet, & Guiard, 2013) presented Bezel-Tap, which was a single-finger tap on the bezel followed by a single-finger swipe in the screen. It demonstrated the benefit of using sequential gesture combinations for designing new gestures. Bezel-initiated gestures have also been explored to address the limited thumb reach problem (Kim, Yu, & Lee, 2012; Li, Fu, & Zhu, 2016; Yu, Huang, Hsu, & Hung, 2013). Those works used a bezel-initiated gesture to activate a screen cursor for object selection, or to transform the screen space to bring faraway object closer to the thumb. They all used simple single-finger bezel-initiated swipe, without any suggestion on how to explore the design space and design bezel-initiated gestures. It is not obvious whether initiating from the bezel would be a limiting design constraint to interaction designers or end users. Instead, our work is not about the design of a specific bezel-initiated gesture for a specific task but the exploration of the multi-dimensional gesture design space.

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