Graffiti vs. unistrokes: an empirical comparison

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

• Type: Conference
• Year: 2008
• Where: CHI
• Authors: Steven J. Castellucci, I. Scott MacKenzie
• Keywords: CHI 2008, Human Computer Interaction, Long-term Performance, Study Comparing Entry, Text Entry Techniques