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Eyes-free text entry on a touchscreen phone

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2 Author(s)
Tinwala, H. ; Dept. of Comput. Sci. & Eng., York Univ., Toronto, ON, Canada ; MacKenzie, I.S.

We present an eyes-free text entry technique for touchscreen mobile phones. Our method uses Graffiti strokes entered using a finger on a touchscreen. Although visual feedback is present, eyes-free entry is possible using auditory and tactile stimuli. In eyes-free mode, entry is guided by speech and non-speech sounds, and by vibrations. A study with 12 participants was conducted using an Apple iPhone. Entry speed, accuracy, and stroke formations were compared between eyes-free and eyes-on modes. Entry speeds reached 7.00 wpm in the eyes-on mode and 7.60 wpm in the eyes-free mode. Text was entered with an overall accuracy of 99.6%. KSPC was 9% higher in eyes-free mode, at 1.36, compared to 1.24 in eyes-on mode.

Published in:

Science and Technology for Humanity (TIC-STH), 2009 IEEE Toronto International Conference

Date of Conference:

26-27 Sept. 2009

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