Interesting IQ Test by Yale University • Hacker News Board

Re: Interesting IQ Test by Yale University

#31

Post by maxwin » Fri, Apr 23, 2010, 10:28 PM UTC

maxwin wrote: post #27

I see it both ways after 4 minutes. But I didn't get it initially. Can this be practiced? Just focus anywhere on her body (butt or straight foot), after 10 to 40 seconds, it just automatically switches.

Wow. Now I can see it turning both left and right at the same time. It's pretty weird.

Re: Interesting IQ Test by Yale University

#32

Post by skorgu » Fri, Apr 23, 2010, 10:32 PM UTC

maxwin wrote: post #27

I see it both ways after 4 minutes. But I didn't get it initially. Can this be practiced? Just focus anywhere on her body (butt or straight foot), after 10 to 40 seconds, it just automatically switches.

Anecdotally it seems like it can be pretty easily trained. It took me a few minutes to get it to switch at all but from there it was pretty easy to go from having to stare at the foot to having to look away to having a specific time in the rotation to be able to alternate (almost) at will.

Of course if it was an animation of the shadow of a turning teapot I probably wouldn't have bothered so there's that.

Re: Interesting IQ Test by Yale University

#33

Post by crs » Fri, Apr 23, 2010, 10:46 PM UTC

detst wrote: post #24

It seems that no one has claimed not to be able to do this so I will. It's driving me mad. I spent at least 5 minutes on it. I cannot see how she could possibly appear to be moving counter-clockwise.

Its probably going to work different for everyone. I see some saying they concentrate on the feet. I just look at the torso and the arm. To switch directions at will I just have to imagine the arm going behind or in front of the body. Its not instant, it takes a revolution or two.

Re: Interesting IQ Test by Yale University

#34

Post by jamesfoster » Fri, Apr 23, 2010, 10:54 PM UTC

detst wrote: post #24

It seems that no one has claimed not to be able to do this so I will. It's driving me mad. I spent at least 5 minutes on it. I cannot see how she could possibly appear to be moving counter-clockwise.

To make the switch, visualize what the rotation you will see if you are standing above her looking directly down at her or from below her looking directly up at her.

Re: Interesting IQ Test by Yale University

#35

Post by Kejistan » Fri, Apr 23, 2010, 10:59 PM UTC

gojomo wrote: post #28

detst wrote: post #24

It seems that no one has claimed not to be able to do this so I will. It's driving me mad. I spent at least 5 minutes on it. I cannot see how she could possibly appear to be moving counter-clockwise.

Using your hands to block part of the image -- try the top, bottom, or top and bottom (revealing only the middle) may help.

I actually found the switch to be most apparent when focusing on the left/right sides of the figure. The left rotates counter-clockwise, while the right rotates clockwise.

Re: Interesting IQ Test by Yale University

#36

Post by Tycho » Sat, Apr 24, 2010, 12:08 AM UTC

detst wrote: post #24

It seems that no one has claimed not to be able to do this so I will. It's driving me mad. I spent at least 5 minutes on it. I cannot see how she could possibly appear to be moving counter-clockwise.

I came across this animation years ago and most people I shared it with could only perceive one direction of motion - including folk I'd put money on having a higher IQ than myself (I don't know my IQ, though).

I suppose another variable is how long you get to look at it - I seem to remember being similarly frustrated at first.