Longitudinal evaluation of discrete consecutive gaze gestures for text entry

Eye-typing performance results are reported from controlled studies comparing an on-screen keyboard and EyeWrite, a new on-screen gestural input alternative. Results from the first pilot study suggest the presence of a learning curve that novice users must overcome in order to gain proficiency in EyeWrite's use (requiring practice with its letter-like gestural alphabet). Results from the second longitudinal study indicate that EyeWrite's inherent multi-saccade handicap (4.52 saccades per character, frequency-weighted average) is sufficient for the on-screen keyboard to edge out EyeWrite in speed performance. Eye-typing speeds with EyeWrite approach 5 wpm on average (8 wpm attainable by proficient users), whereas keyboard users achieve about 7 wpm on average (in line with previous results). However, EyeWrite users leave significantly fewer uncorrected errors in the final text, with no significant difference in the number of errors corrected during entry, indicating a speedacc...

• Type: Conference
• Year: 2008
• Where: ETRA
• Authors: Jacob O. Wobbrock, James Rubinstein, Michael W. Sawyer, Andrew T. Duchowski
• Keywords: Biometrics, ETRA 2008, Letter-like Gestural Alphabet, On-screen Gestural Input, On-screen Keyboard