FingerT9: Leveraging Thumb-to-finger Interaction for Same-side-hand Text Entry on Smartwatches
summary
Maps a T9 layout onto 11 finger segments plus 3 function keys so the thumb taps finger zones to enter text; prototype pairs a 1.5" 240px smartwatch with a glove of 15 capacitive sensors. Evaluations: participants transcribe 20 phrases per session; FingerT9 types significantly faster and more accurately than tilt-based SSH input and is comparable to direct-touch in speed and error rate. A five-day study with four users shows stronger learning gains and enables eyes-free typing once layout is memorized.
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