No-look flick: Single-handed and eyes-free Japanese text input system on touch screens of mobile devices

Yoshitomo Fukatsu, Buntarou Shizuki, Jiro Tanaka

Research output: Chapter in Book/Report/Conference proceedingConference contribution

13 Citations (Scopus)

Abstract

We present a single-handed and eyes-free Japanese kana text input system on touch screens of mobile devices. We first conducted preliminary experiments to investigate the accuracy with which subjects could single-handedly point to and flick without using their eyes. We found from the results that users can point at a screen that was divided into 2 x 2 with 100% accuracy and that users can flick at a 2 x 2 grid without using their eyes with 96.1% accuracy using our algorithm for flick recognition. The system used kana letter input based on two-stroke input with three keys to enable accurate eyes-free typing. First, users flick for consonant input, and then similarly flick for vowel input. We conducted a long-term user study to measure basic text entry speed and error rate performance under eyes-free conditions, and readability of transcribed phrases. As a result, the mean text entry speed was 51.2 characters per minute (cpm) in the 10th session of the user study and the mean error rate was 0.6% of all characters. The mean text entry speed was 33.9 cpm in the 11th session, which was conducted under totally eyes-free conditions and the mean error rate was 4.8% of all characters. We not only measured cpm and error rate, but also measured error rate of reading, which we devised as a novel metric to measure how accurately users can read transcribed phrases. The mean error rate of reading in the 11th session was 5.7% of all phrases.

Original languageEnglish
Title of host publicationMobileHCI 2013 - Proceedings of the 15th International Conference on Human-Computer Interaction with Mobile Devices and Services
Pages161-170
Number of pages10
DOIs
Publication statusPublished - 2013 Sep 16
Event15th International Conference on Human-Computer Interaction with Mobile Devices and Services, MobileHCI 2013 - Munich, Germany
Duration: 2013 Aug 272013 Aug 30

Publication series

NameMobileHCI 2013 - Proceedings of the 15th International Conference on Human-Computer Interaction with Mobile Devices and Services

Other

Other15th International Conference on Human-Computer Interaction with Mobile Devices and Services, MobileHCI 2013
CountryGermany
CityMunich
Period13/8/2713/8/30

Keywords

  • heads-up writing
  • multi-tap
  • one-handed interaction
  • pointing
  • shoulder surfing
  • text entry
  • touch typing
  • touchscreen phones

ASJC Scopus subject areas

  • Human-Computer Interaction
  • Software

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  • Cite this

    Fukatsu, Y., Shizuki, B., & Tanaka, J. (2013). No-look flick: Single-handed and eyes-free Japanese text input system on touch screens of mobile devices. In MobileHCI 2013 - Proceedings of the 15th International Conference on Human-Computer Interaction with Mobile Devices and Services (pp. 161-170). (MobileHCI 2013 - Proceedings of the 15th International Conference on Human-Computer Interaction with Mobile Devices and Services). https://doi.org/10.1145/2493190.2493243