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Delboeuf Illusion Paper

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Like many visual illusions, the Delboeuf illusion demonstrates the perceptual failure of the human visual system. A study by Parrish, Brosnan, and Beran (2015) examined the effect of the Delboeuf illusion through a comparative study between humans and Rhesus Monkeys, as well as Capuchin Monkeys. I will only be focusing on the effect the Delboeuf illusion had on human participants within two experiments. The first experiment tested twenty-two undergraduate students within two experimental groups. Human participants were presented with a series of trials where they would have to selected the bigger of the two dot sizes presented. Dots within trials were either both surrounded by rings or not. Not every trial consisted of equivalent dots. There

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