EdgeWrite: a stylus-based text entry method designed for high accuracy and stability of motion

  • Authors:

  • Jacob O. Wobbrock;Brad A. Myers;John A. Kembel

  • Affiliations:

  • Human Computer Interaction Institute, School of Computer Mellon University, 5000 Forbes Avenue, Pittsburgh, PA;Human Computer Interaction Institute, School of Computer Mellon University, 5000 Forbes Avenue, Pittsburgh, PA;Human Computer Interaction Institute, School of Computer Mellon University, 5000 Forbes Avenue, Pittsburgh, PA

  • Venue:
  • Proceedings of the 16th annual ACM symposium on User interface software and technology
  • Year:
  • 2003

Quantified Score

Hi-index 0.00

Visualization

Abstract

EdgeWrite is a new unistroke text entry method for handheld devices designed to provide high accuracy and stability of motion for people with motor impairments. It is also effective for able-bodied people. An EdgeWrite user enters text by traversing the edges and diagonals of a square hole imposed over the usual text input area. Gesture recognition is accomplished not through pattern recognition but through the sequence of corners that are hit. This means that the full stroke path is unimportant and recognition is highly deterministic, enabling better accuracy than other gestural alphabets such as Graffiti. A study of able-bodied users showed subjects with no prior experience were 18% more accurate during text entry with Edge Write than with Graffiti (p.05), with no significant difference in speed. A study of 4 subjects with motor impairments revealed that some of them were unable to do Graffiti, but all of them could do Edge Write. Those who could do both methods had dramatically better accuracy with Edge Write.