8EYE TRACKING
Eye tracking is a popular technique in experimental psychology and cognitive neuroscience. It is applied to humans, other primates, and even to some non-primate animals. (That’s no joke; see for example a study in rats by Wallace et al., 2013– the videos in the supplementary materials are amazing!) Eye tracking usually involves pointing a camera at someone’s face, and using it to estimate where they are looking.
Eye tracking offers a lot of things to measure: where people look (fixations), how people move their eyes (saccadic trajectories), how quickly they do it (saccadic response time and velocity), and how big their pupils are (pupillometry). These metrics can give us insight into many things, including what people ...
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