The pupils of our eyes get larger when we are focusing on a task–and the size may give clues about our working memory capabilities, a new study has found.A person's pupils dilate in low-light environments to let more light into the eye and help us see. However, an experiment by researchers at the University of Texas at Arlington found that our pupils also widen when we're concentrating.
'For the highest-performing participants, their pupil dilations were both larger overall and the individuals were more discerning about the information they were asked to recall.''This is exciting research because it adds another valuable piece of the puzzle to our understanding of why working memory varies between individuals.
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