The RESEARCHERS have developed an illusion that will make you see something that doesn’t really exist.
Scientists from the California Institute of Technology (Caltech) use this video to explain a strange phenomenon in the brain.
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Scientists in California have developed an illusionCredit: Caltech
The video shows a series of beeps and flashes in rapid succession.
You have to look at the cross in the middle of the screen and see how many sparkles appear at the bottom.
Most people will see three flashes, the same number of beeps, but when they watch the video without the beeps, they only see two flashes.
This is because our brains play tricks on us to fill in the gaps in our memories.
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The beeps trick your brain into thinking there are three flashes Credit: Caltech
Scientists call the illusion the ‘Illusory Rabbit’.
A Caltech spokesperson said: “Although only two flashes are played, most people viewing the illusion perceive three flashes, with the illusory flash coinciding with the second beep and appearing to be in the center of the screen.”
This phenomenon in the human brain is called ‘postdictive processing’.
Noelle Stiles, lead author of the study, told Caltech: “When the last pair of beeps and flashes is presented later, the brain assumes that the flash associated with the unpaired beep must have been missed and literally makes up the fact that it must there must have been a second flash that was lost.
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There are actually only two flashes, but your brain fills in the blanks Credit: Caltech
“This already implies a postdictive mechanism at work.”
He added: “But more importantly, the only way to detect an illusory flash would be if later arriving information (the final combination of beep and flash) is used to reconstruct the most likely location of the illusory flash.” . also.”
This study explains how postdiction helps our brains combine different senses to interpret our environment.
The reason for these illusions is that our brains can make sense of events from the past, often filling in gaps we may not have actually seen.
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Ms Stiles continued: “Illusions are a really interesting window into the brain.
“By investigating illusions, we can study the brain’s decision-making process. For example, how does the brain determine reality with information from multiple senses that is sometimes noisy and contradictory?
“The brain uses assumptions about the environment to solve this problem.
“When these assumptions are wrong, illusions can occur as the brain tries to make the best sense of a confusing situation.”
Shinsuke Shimojo, a researcher on the study, explained: “Postdiction may sound mysterious, but it’s not: it takes into account how long it takes the brain to process prior visual stimuli, during which time subsequent stimuli from different senses can influence or modulate behavior. first.
“These illusions are among the very rare cases where sound affects vision and not the other way around, suggesting dynamic aspects of neural processing taking place in space and time.”
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Categories: Optical Illusion
Source: newstars.edu.vn