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Dominik Bial

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Publications by Dominik Bial (bibliography)

2011

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Bial, Dominik, Kern, Dagmar, Alt, Florian and Schmidt, Albrecht (2011): Enhancing outdoor navigation systems through vibrotactile feedback. In: Proceedings of ACM CHI 2011 Conference on Human Factors in Computing Systems 2011. pp. 1273-1278.

“While driving many tasks compete for the attention of the user, mainly via the audio and visual channel. When designing systems depending upon providing feedback to users (e.g., navigation systems), it is a crucial prerequisite to minimize influence on and distraction from the driving task. This becomes even more important when designing systems for the use on motorbikes; space for output devices is scarce, as people are wearing helmets visual feedback is often difficult due to lighting conditions, and audio feedback is limited. In a first step we aimed at creating an understanding as to how information could be communicated in a meaningful way using vibrotactile signals. Therefore, we investigated suitable positions of actuators on the hand, appropriate length of the vibration stimulus, and different vibration patterns. We built a first prototype with 4 vibration actuators attached to the fingertips and asked 4 participants to test our prototype while driving. With this work we envision to lay the foundations for vibrotactile support in navigation systems.”

2010

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Bial, Dominik, Block, Florian and Gellersen, Hans-Werner (2010): A study of two-handed scrolling and selection on standard notebook computers. In: Proceedings of the HCI10 Conference on People and Computers XXIV 2010. pp. 355-364.

“Although two-handed input can improve both efficiency and quality of user interaction, it is not commonly adopted as it requires additional input devices. In this paper we propose two-handed interaction on standard hardware -- notebooks with external mouse -- and for a common task -- 2D scrolling. We introduce four techniques that leverage the built-in touchpad as a dedicated scrolling device for the non-dominant hand, for scenarios in which the mouse is used in parallel for object selection and manipulation tasks. The techniques implement relative scrolling, flicking, absolute positioning and token-based input on the touchpad. We present an empirical evaluation of these techniques in a task that simulates activities such as retouching of photos, or interaction with maps, in which users often switch between mouse interaction and scrolling. The results show initially best performance with relative scrolling as a familiar mapping, but strong learning effects for all techniques. Users had difficulty with absolute mapping of touchpad input due to a tendency to clutching and finger repositioning, but we observed that these problems are compensated when a token is used as absolute input device.”

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