By Christine Younan
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While puzzles provide entertainment for hours, brainteasers are also a good way to see how creative you are , enhance focus and concentration, as well as improve mental agility and problem-solving skills. Some optical illusions can be totally baffling, while others could leave you disagreeing with family and friends. Now if you want to encourage creative thinking and improve your visual literacy, one brainteaser online is seriously scratching heads on Reddit . In a post shared on the iconic optical illusions forum, which has thousands of members, it showed some dots before asking what colour are they in the mind-bending image online. The question asked: ” Are these dots blue or purple?” So are you up for the challenge? Make sure you let us know how you get on in the comments section below… The post racked up 4,900 upvotes and hundreds of comments. One person said: “Definitely violet.” While another added: “They’re all purple.” Someone else commented: “I’m not seeing any blue myself…” While a fourth posted: “Only one is purple to me, but it keeps moving around.” Then a fifth wrote: “My eyes are going crazy… I guess I’m not going to sleep now. Thanks for sharing.” And a Reddit user chimed in: “My perception of the colour changes depending on whether I’m focusing directly on the dot. I perceive a purple dot where I look surrounded by a sea of blue dots.” It’s not uncommon to come across an optical illusion which shows different colours. These illusions trick the brain’s perception of colour and contrast, often through techniques like colour adaptation, negative afterimages. An example would be the Lilac Chaser illusion where a rotating green disc appears on a circle of lilac discs, and the 12 Dot Illusion, where not all twelve black dots are simultaneously visible due to the limitations of human vision. A more famous example would be the dress debate, where people couldn’t agree if they saw blue and black, or gold and white. In one study, Michael Webster, a psychologist from the University of Nevada, Reno, said the illusion occurred because of the ambiguity of the colour blue, and people’s inability to reliably discern blue objects from blue lighting. So what colour dots did you see in the image? Let us know in the comments section below…
