Preface to the Third Edition
Ten years (almost to the day) have elapsed since the writing of the second edition.
As the technology has proliferated, so has the research output associated with the
use of the eye tracker. While the ACM Symposium on Eye Tracking Research &
Applications (ETRA) is now fairly well established, drawing high-quality scientific
content, a number of specialized venues have also appeared, including (in no
particular order):
• Eye Tracking South Africa (ETSA)
• Pervasive Eye Tracking and Mobile Eye-Based Interaction (PETMEI)
• Solutions for Automatic Gaze-Data Analysis (SAGA)
• Eye Tracking for Spatial Research (ET4S)
• Eye Tracking and Visualization (ETVIS)
The amount of literature related to eye tracking methodology is now consider-
able. In addition to journal articles (including the Journal of Eye Movement
Research [JEMR] and the Transactions on Applied Perception [TAP]) and con-
ference proceedings, a number of notable monographs and textbooks have also
appeared, including those of Holmqvist et al. (2011), Majaranta et al. (2011),
Sundstedt (2011), and Bojko (2013).
While new technology precipitated the writing of the second edition, the third
edition draws inspiration from advancements in analytical techniques and the
increased availability of scholarly contributions. Concordantly, the third edition
includes advancements concerning:
1. calibration accuracy, precision, and correction;
2. convolution-based eye movement analysis;
3. eye movement analysis including ambient/focal fixation classification with the
K coefficient and gaze transition comparison with transition matrix entropy;
4. binocular eye movement analysis;
5. broadened application examples including desig n and Geo-Information
Systems (GIS); and
6. eye movement synthesis (e.g., for testing fixation filters and for rendering of
avatar eye rotations).
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