Eye gaze interaction with expanding targets

  • Authors:
  • Darius Miniotas;Oleg Špakov;I. Scott MacKenzie

  • Affiliations:
  • University of Tampere, Tampere, Finland;University of Tampere, Tampere, Finland;York University, Toronto, ON, Canada

  • Venue:
  • CHI '04 Extended Abstracts on Human Factors in Computing Systems
  • Year:
  • 2004

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Abstract

Recent evidence on the performance benefits of expanding targets during manual pointing raises a provocative question: Can a similar effect be expected for eye gaze interaction? We present two experiments to examine the benefits of target expansion during an eye-controlled selection task. The second experiment also tested the efficiency of a "grab-and-hold algorithm" to counteract inherent eye jitter. Results confirm the benefits of target expansion both in pointing speed and accuracy. Additionally, the grab-and-hold algorithm affords a dramatic 57% reduction in error rates overall. The reduction is as much as 68% for targets subtending 0.35 degrees of visual angle. However, there is a cost which surfaces as a slight increase in movement time (10%). These findings indicate that target expansion coupled with additional measures to accommodate eye jitter has the potential to make eye gaze a more suitable input modality.