Abstract

Eye-trackers are used to estimate an individual’s gaze direction (Weigle & Banks,
2008). They are important because eye movements are the most frequently made
human movement (Richardson & Spivey, 2004), and therefore could potentially provide
insight into human perception, action, and cognition. Eye-tracking has a variety
of applications (Duchowski, 2002), from understanding low-level vision and cognition
to a range of applied applications such as driving (e.g., Mackenzie & Harris,
2014) and marketing (van der Laan, Hooge, de Ridder, Viergever, & Smeets, 2015).
Furthermore, although eye-trackers have become increasingly popular and used to
address a range of different questions over the past 50 years, there now seems to be a
consensus on in its importance and usage (Jacob & Karn, 2003).