Your eye movements tell who you are A Shirama, A Koizumi, N Kitagawa |
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Human and Information Science Laboratory, NTT Communication Science Laboratories, Japan
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| It has been shown that when observing a visual scene, people show eye movements that are unique to individuals. This is not surprising because different individuals often attend to different objects in the scene. The present study explored fundamental and intrinsic characteristics of eye movements that directly reflect individuality. We measured participants’ eye movements while they made a short speech in front of several ordinary scenes (e.g., class room) projected onto a large screen. A discriminant analysis of physical properties of their eye movements distinguished between individuals with high accuracy regardless of the scene. We also found the consistency of one’s eye movements between the periods when participants were preparing the content for their speech and when they were giving the speech. Even after seven months, we found their eye movements are very similar to those measured in the first experiment. The independence from the visual environment and a given task, as well as the long-term consistency suggests that spontaneous eye movements express who s/he is. We also showed that human observers can identify individuals by seeing computer-generated animations simulating real eye movements. The eyes may convey individual character to others and play some roles in interpersonal communication. |
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