FingerArc and FingerChord: Supporting Novice to Expert Transitions with Guided Finger-Aware ...
summary
Prototype implements FingerArc and FingerChord using cameras and tiny visual markers to detect a held key posture, then disambiguate subcommands by thumb angle or by pressing a relative row. Design overloads each letter key with eight extra commands and adds on-screen dynamic guidance plus an open-hand cancellation. A 32-participant controlled study with 60 commands (training blocks, 24-hour recall) finds faster performance for ungrouped items, FingerArc yields ~15% more expert use, users average 1.2 attempts and cancel 8% of trials, and guidance proves the biggest benefit over baseline and GuidedKey.
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chapters (5)
- 0:00Introduction and motivation
- 3:40Research findings on shortcuts
- 7:57Introducing FingerArc and FingerChord
- 11:34User study design and results
- 18:47Summary and Q&A
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