Scientists at mit (USA) explained the nature of optical illusions based on perception of the background. The study was published in the journal Vision Research.
Specialists set the task to find out how people perceive two identical dots placed on a different background, painted in different colors objects. According to experts, is based on the phenomenon of the oldest techniques used by Chinese artists for over 800 years. Scientists came to the conclusion that the brightness of the background has a huge role in the perception of images.
As a result of several tests, the researchers found that the evaluation of the brightness level occurs at an early stage in the visual processing of objects — even before the brain will analyze what he saw. According to neuroscientist Pavan Singh (Pawan Sinha), this feature of the organism is an innate function of the low level, and does not appear with acquired visual experience. This would explain the fact that optical illusion affects almost all people.
To confirm the hypothesis, the scientists conducted an experiment with nine children ranging in age from 8 to 17 years who were born blind but regained sight after surgery. As predicted by Sinha, all participants were exposed to optical illusions — children mistakenly distinguished between two identical points located on a gradient background.
According to conclusion of experts, the study provides an opportunity to understand how the brain analyzes the received optical information channels. “Many phenomena which we attributed to differential higher-level processes, in fact, have a more simple mechanism,” concluded Pawan Sinha.
Video, photo All from Russia.