Experimental Evaluations of the Twiddler One-Handed Chording Mobile Keyboard

@article{Lyons2006ExperimentalEO,
  title={Experimental Evaluations of the Twiddler One-Handed Chording Mobile Keyboard},
  author={Kent Lyons and Thad Starner and Brian D. Gane},
  journal={Human–Computer Interaction},
  year={2006},
  volume={21},
  pages={343 - 392}
}
The HandyKey Twiddler™ is a one-handed chording mobile keyboard that employs a 3 × 4 button design, similar to that of a standard mobile telephone. We present a longitudinal study of novice users' learning rates on the Twiddler. Ten participants typed for 20 sessions using 2 different text entry methods. Each session was composed of 20 min of typing with multitap and 20 min of one-handed chording on the Twiddler. We found that users initially had a faster average typing rate with multitap… 
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Automatic Whiteout++: Correcting Mini-QWERTY Typing Errors Usi ng Keypress Ti mi ng Jame sClawson ,Ken tLyons † ,Ale xRudnick ,Rober tA .Iannucc iJr. ,an dTha dStarner College of Computing and GVU Center
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