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#16. Visual Perception Brain Teaser

QUESTION: Is the inner shape a real cir­cle?

visual circle brain teaser

Hint:
Some­times extra­ne­ous infor­ma­tion around your tar­get can dis­tort your view. Try cov­er­ing the lines with a piece of card to remove some of the inter­fer­ing infor­ma­tion.

Brain func­tions involved:
Here you are exer­cis­ing your visu­al per­cep­tion and deci­sion-mak­ing skills. The visu­al cor­tex in your occip­i­tal lobes process­es visu­al input from your eyes. Not only is the occip­i­tal lobe main­ly respon­si­ble for visu­al recep­tion, it also con­tains asso­ci­a­tion areas that help in the visu­al recog­ni­tion of shapes and col­ors. The prob­lem solv­ing, selec­tive atten­tion, and exec­u­tive func­tions used in this exer­cise are han­dled by the ante­ri­or por­tion of the frontal lobes.

ANSWER:
Believe it or not, both shapes are per­fect cir­cles.

Next brain teas­er in Sharp­Brains’ top 25 series:

  • #17. Less obvi­ous than it may appear

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18 Responses

  1. Randy says:

    Ok! I final­ly got one. I could see the cir­cle with­in the cir­cle. Then I tried to com­pli­cate it by look­ing for a math­mat­i­cal solu­tion.

  2. Caroline says:

    Glad you got it Randy! I think the moral of that sto­ry is sim­pli­fy! 🙂

  3. Mitch says:

    I could see past the lines and see the cir­cle as it would appear on its own — a per­fect cir­cle.

  4. miss says:

    its a per­fect round cir­cle

  5. yahobahne says:

    I see two cir­cles although por­tions of the round­ed lines are bro­ken. I don’t get it.

  6. Alvaro says:

    That’s good: they are 2 full cir­cles. The inte­ri­or one may look like an oval giv­en its posi­tion­ing-this is a visu­al illu­sion.

  7. yahobahne says:

    Well Alvaro, my visu­al illu­sion only allows me to see the cir­cles. I tried to look for the oval, but could­nt find it. Thxs

  8. gothgirl818 says:

    wow that was well…interesting..

  9. Nevers says:

    if you look at the cen­ter of the out­er cir­cle then you can see that the inner cir­cle is not per­fect. periph­er­als every­body.

  10. Mukesh says:

    yes. inner shape is a cir­cle

  11. bush will says:

    In my per­cep­tion it is not look­ing like cor­rect­ly cir­cle, but like cir­cle.

  12. anthonette says:

    ya.… it looks like a cir­cle

  13. catiana271 says:

    I thought it was a per­fect cir­cle. When I first looked at it, I thought it wasn’t. When they asked me to see if it was, I looked clos­er and saw that it was.

  14. Eclipse1601 says:

    yes; it just appears to not be one b/c of the angle.

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