Niels Henze
Enrico Rukzio
Susanne Boll
ABSTRACT
With the rise of current smartphones, virtual keyboards for touchscreens became the dominant mobile text entry technique. We developed a typing game that records how users touch on the standard Android keyboard to investigate users' typing behaviour. 47,770,625 keystrokes from 72,945 installations have been collected by publishing the game. By visualizing the touch distribution we identified a systematic skew and derived a function that compensates this skew by shifting touch events. By updating the game we conduct an experiment that investigates the effect of shifting touch events, changing the keys' labels, and visualizing the touched position. Results based on 6,603,659 keystrokes and 13,013 installations show that visualizing the touched positions using a simple dot decreases the error rate of the Android keyboard by 18.3% but also decreases the speed by 5.2% with no positive effect on learnability. The Android keyboard outperforms the control condition but the constructed shift function further improves the performance by 2.2% and decreases the error rate by 9.1%. We argue that the shift function can improve existing keyboards at no costs.
Supplemental Material
- Apple Inc. iOS Human Interface Guidelines, 2010.Google Scholar
- Balakrishnan, V., and Yeow, P. A study of the effect of thumb sizes on mobile phone texting satisfaction. Journal of Usability Studies 3 (2008).Google Scholar
- Gunawardana, A., Paek, T., and Meek, C. Usability guided key-target resizing for soft keyboards. In Proc. IUI (2010). Google ScholarDigital Library
- Henze, N., Rukzio, E., and Boll, S. 100,000,000 taps: Analysis and improvement of touch performance in the large. In Proc. MobileHCI (2011). Google ScholarDigital Library
- Himberg, J., Häkkilä, J., Kangas, P., and Mäntyjärvi, J. On-line personalization of a touch screen based keyboard. In Proc. IUI (2003). Google ScholarDigital Library
- Holz, C., and Baudisch, P. Understanding touch. In Proc. CHI (2011). Google ScholarDigital Library
- Karlson, A. Interface Design for Single-Handed Use of Small Devices. In Proc. UIST (2008).Google Scholar
- Kristensson, P.-O., and Zhai, S. Relaxing stylus typing precision by geometric pattern matching. In Proc. IUI (2005). Google ScholarDigital Library
- Lee, S., and Zhai, S. The performance of touch screen soft buttons. In Proc. CHI (2009). Google ScholarDigital Library
- Lewis, J. R. Literature review of touch screen research from 1980 to 1992. In IBM Technical Report 54.694 (1993).Google Scholar
- MacKenzie, I., and Soukoreff, R. Phrase sets for evaluating text entry techniques. In Adjunct Proc. CHI (2003). Google ScholarDigital Library
- Parhi, P., Karlson, A., and Bederson, B. Target size study for one-handed thumb use on small touchscreen devices. In Proc. MobileHCI (2006). Google ScholarDigital Library
- Park, Y., Han, S., Park, J., and Cho, Y. Touch key design for target selection on a mobile phone. In Proc. MobileHCI (2008). Google ScholarDigital Library
- Perry, K., and Hourcade, J. Evaluating one handed thumb tapping on mobile touchscreen devices. In Proc. GI (2008). Google ScholarDigital Library
- Roudaut, A., Huot, S., and Lecolinet, E. TapTap and MagStick: improving one-handed target acquisition on small touch-screens. In Proc. AVI (2008). Google ScholarDigital Library
- Rudchenko, D., Paek, T., and Badger, E. Text text revolution: A game that improves text entry on mobile touchscreen keyboards. In Proc. Pervasive (2011). Google ScholarDigital Library
- Schildbach, B., and Rukzio, E. Investigating selection and reading performance on a mobile phone while walking. In Proc. MobileHCI (2010). Google ScholarDigital Library
- Sears, A. Improving touchscreen keyboards: Design issues and a comparison with other devices. Interacting with computers 3 (1991).Google Scholar
- Sears, A., and Zha, Y. Data entry for mobile devices using soft keyboards: Understanding the effects of keyboard size and user tasks. International Journal of Human-Computer Interaction 16 (2003).Google Scholar
- Vogel, D., and Baudisch, P. Shift: a technique for operating pen-based interfaces using touch. In Proc. CHI (2007). Google ScholarDigital Library
- Yatani, K., Partridge, K., Bern, M., and Newman, M. Escape: a target selection technique using visually-cued gestures. In Proc. CHI (2008). Google ScholarDigital Library
Index Terms
- Observational and experimental investigation of typing behaviour using virtual keyboards for mobile devices
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