CHI '93 Proceedings of the INTERACT '93 and CHI '93 Conference on Human Factors in Computing Systems
The immediate usability of graffiti
Proceedings of the conference on Graphics interface '97
Phrase sets for evaluating text entry techniques
CHI '03 Extended Abstracts on Human Factors in Computing Systems
Unipad: single stroke text entry with language-based acceleration
Proceedings of the 4th Nordic conference on Human-computer interaction: changing roles
Modeling human performance of pen stroke gestures
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
TapList: testing the effectiveness of tap access to the n-best list in pen-based text entry
Mobility '09 Proceedings of the 6th International Conference on Mobile Technology, Application & Systems
Performance optimizations of virtual keyboards for stroke-based text entry on a touch-based tabletop
UIST '10 Proceedings of the 23nd annual ACM symposium on User interface software and technology
UniWise: LetterWise pour Unistroke, la prédiction de texte pour améliorer la reconnaissance de geste
Conference Internationale Francophone sur I'Interaction Homme-Machine
Improving stylus interaction for eMedical forms
Proceedings of the 22nd Conference of the Computer-Human Interaction Special Interest Group of Australia on Computer-Human Interaction
AirStroke: bringing unistroke text entry to freehand gesture interfaces
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Brailletouch: mobile texting for the visually impaired
UAHCI'11 Proceedings of the 6th international conference on Universal access in human-computer interaction: context diversity - Volume Part III
Estimating the perceived difficulty of pen gestures
INTERACT'11 Proceedings of the 13th IFIP TC 13 international conference on Human-computer interaction - Volume Part II
User learning and performance with bezel menus
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Augmented letters: mnemonic gesture-based shortcuts
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
ZoomBoard: a diminutive qwerty soft keyboard using iterative zooming for ultra-small devices
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Activity or product?: drawing and HCI
Proceedings of the International Conference on Multimedia, Interaction, Design and Innovation
Complementing text entry evaluations with a composition task
ACM Transactions on Computer-Human Interaction (TOCHI)
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Unistrokes and Graffiti are stylus-based text entry techniques. While Unistrokes is recognized in academia, Graffiti is commercially prevalent in PDAs. Though numerous studies have investigated the usability of Graffiti, none exists to compare its long-term performance with that of Unistrokes. This paper presents a longitudinal study comparing entry speed, correction rate, stroke duration, and preparation (i.e., inter-stroke) time of these two techniques. Over twenty fifteen-phrase sessions, performance increased from 4.0 wpm to 11.4 wpm for Graffiti and from 4.1 wpm to 15.8 wpm for Unistrokes. Correction rates were high for both techniques. However, rates for Graffiti remained relatively consistent at 26%, while those for Unistrokes decreased from 43% to 16%.