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Calibration-Free Gaze Interfaces Based on Linear Smooth Pursuit.

Zeng Zhe1, Felix Wilhelm Siebert2, Antje Christine Venjakob3

  • 1Chair of Human-Machine Systems, Technische Universität Berlin, Germany.

Journal of Eye Movement Research
|April 8, 2021
PubMed
Summary
This summary is machine-generated.

Gaze interface design using linear smooth pursuit eye movements is more intuitive with fewer objects. Faster object speeds improve user performance and reduce errors in calibration-free gaze interaction.

Keywords:
calibration-freeeye movementeye trackinggazegaze interactionsmooth pursuit

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Area of Science:

  • Human-Computer Interaction
  • Eye Tracking Technology
  • Usability Engineering

Background:

  • Smooth pursuit eye movements offer intuitive, calibration-free interaction in gaze interfaces.
  • Existing research primarily addresses curved trajectories, leaving linear trajectory design issues underexplored.

Purpose of the Study:

  • To evaluate user performance in gaze interfaces utilizing linear smooth pursuit eye movements.
  • To investigate the impact of object quantity and movement speed on user interaction within these interfaces.

Main Methods:

  • An experiment was conducted varying the number of objects (6-15) and their movement speed (7.73 ˚/s vs. 12.89 ˚/s).
  • User performance was assessed based on detection rates and orientation error in a gaze-based selection task.

Main Results:

  • The number of objects significantly impacted correct and false detection rates, with optimal performance observed for 6-8 objects.
  • Faster object movement speed (12.89 ˚/s) led to higher detection rates and reduced orientation error compared to slower speeds (7.73 ˚/s).

Conclusions:

  • Interface design with fewer objects (6-8) enhances user performance in linear smooth pursuit gaze interactions.
  • Optimizing object speed is crucial for improving accuracy and reducing errors in calibration-free gaze interfaces.