Wang (2011) mentioned that a video-based eye-tracker which uses video cameras to record the eye position of human subjects—recording pupil dilation and eye movement—can be used to examine how fixations, saccades, and pupil dilation responses are related to the information on the screen and behavioral choices. According to Wang (2011:185), "understanding the relationship between these observables can help us to understand how human behavior in the economy can be affected by what information people acquire, where their attention is focused, what emotional state they are in, and even what brain activity they are engaged in.
Wang (2011) noted that a video-based eye-tracker, which employs video cameras to document human subjects' eye positions—tracking pupil dilation and eye movements—can be used to investigate the connections between fixations, saccades, and pupil dilation responses with information on the screen and behavioral choices. According to Wang (2011:185), "understanding these observable relationships can assist us in comprehending how human behavior in economics is influenced by what information individuals acquire, where their attention is directed, their emotional state, and even their brain activity.