Proceedings of the 8th Nordic Conference on Human-Computer Interaction Fun, Fast, Foundational - NordiCHI '14
Recent studies have shown that using the body as an interactive surface is particularly well adapted for eyes-free interaction. While researchers have focused on using arms and hand they have not considered using the belly. We argue this surface is especially appropriate for eyes-free interaction because the belly offers a large surface, which is relatively stable even when walking or running. In addition, users can easily reach this surface with their two hands without fatigue or having to
... st the position or orientation of the abdomen. We highlight the advantages of interacting with this surface and present a study that evaluates how users perform gestures on their abdomen. We observed that users use different mental spatial orientations depending on the type of gesture (digits and directional strokes) they have to draw. In particular, our results show that users draw gestures following symmetries relative to a horizontal or vertical axis when they are not provided with visual orientation hints. The more complex the gesture was, the less stability in orientation was observed. Then, we focus on directional strokes and find that, despite the fact that the abdomen is not perfectly linear, users are able to draw almost linear gestures. Especially, they performed very well in cardinal directions. Finally, we propose some guidelines to inform the design of interaction techniques. Figure 1: Examples of situations where Belly Gestures could allow for quick interactions: to skip a song while jogging (left), to control smart glasses (middle), to reject a phone call while riding a bike (right).