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We propose a new interface concept; Proprioceptive Menu with Tactons, an eyes- and ears-free menu in a proprioceptive space that uses a set of Tactons to describe its menu items. While previous proprioceptive menus utilized vibrotactile feedback only to express the boundary between menu items, we spot an unexplored possibility that distinct vibrotactile stimuli, Tactons, can be used to describe the status of each menu item. As an instance of this concept, we present WristMenu with Tactons, an eyes- and ears-free menu using a one-dimensional proprioceptive space of the axial wrist rotation. Users can grasp an overview of each menu item's status through Tactons delivered on their wrist skin and eventually decide to select the desired item. Our evaluation study showed that users could find a target item among five candidates and recognize its status in 5 seconds on average at the accuracies of 93% and 86% in seated and walking conditions, respectively. Through our evaluation, we could confirm the feasibility of the proposed concept. [ABSTRACT FROM AUTHOR]

Smartwatches are a convenient substitute for smartphones in hand-busy situations, but there is limited interactivity to one-handed use of wrist-worn devices. In this paper, we propose WristDial, a one-handed integer input technique which uses quantization of the angular distance of the wrist rotation with nonvisual feedback. Using tactile feedback, we present four techniques based on counting of tactile stimuli. With one of them, 94.44% average accuracy and 2.81 s average completion time were acquired in the task of entering a number from the range 1 to 10. We also evaluate the quantitative performance of the combination of interruptible speech and non-speech auditory feedback. Our results show that when speech feedback exists, adding a continuous change of pitch or clicking sound at the boundaries does not have a significant effect on the performance. Using only speech feedback, 95.47% accuracy and 1.45 s completion time were acquired. [ABSTRACT FROM AUTHOR]