Date:September 28, 2015
Source:Georgia State University
Monkeys perceive visual illusions in the same way great apes and humans see them, according to researchers at Georgia State University.
The findings, published in the Journal of Experimental Psychology: Animal Learning and Cognition in August, indicate humans and monkeys perceive and misperceive the world similarly, which reflects resemblances in these species' perceptual systems and their interpretation of their physical worlds.
In the study, capuchin monkeys and rhesus monkeys saw the Delbouef illusion in a manner similar to human adults. Visual illusions emerge when information is misperceived on the basis of surrounding context or presentation style. The Delboeuf illusion is one type of visual illusion where a dot surrounded by a large ring is typically perceived by humans to be smaller than the same-sized dot surrounded by a small ring. This occurs because the ring creates a specific context in which the dots are perceived.
The Delboeuf illusion has been studied extensively in humans, but previously, only one study has presented this illusion to an animal species.
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