Optical illusion?

[left-of-center2012]

[Dark n Stormy Knight]

2. The reverse is true as well.

Fascinating.

[Foolacious]

3. Very cool. In fact, they're ALL "upside down"...

or rather, right side up. Once your brain sees any of them as right side up, they all flip.

[Harker]

4. It worked for me the first time... months ago...

now they're all right side up all the time.

Hmph.

[Harker]

11. I'll revisit the matter.

I'm fully capable of making some 'mistakes' repeatedly,

I feel as though I should rush out and find an Escher...

[Harker]

13. Ah! That's right!

I needn't rush anywhere!

[smirkymonkey]

23. It's funny, they flip back and forth for me.

I'll see upside down, then right side up and then they'll flip back again, etc. I can't seem to hold it in one position.

[Harker]

25. First thing, bleary eyed

I'm getting that flipping effect, too. The small round ones at the left are always right side up, though.

I also can't stop wondering if they're recyclable.

[gristy]

5. I glanced at it and then looked down to take a sip of my drink...

On that first glance they were indeed all upside down. When I looked up they were all right side up. Now I can't flip it back to upside down. Pretty trippy...

[dewsgirl]

6. I have this in my Google drive, I love this kind of stuff.

[doc03]

7. Soon as I saw the right side up plate they all turned right side up. If I look away for one

second they flip upside down again until I look at the one right side up. They flip if I blink. weird

[denbot]

10. Nice n/t

[TheBlackAdder]

16. The power of suggestion.

[handmade34]

17. oh my

[Dark n Stormy Knight]

18. So, which one did each of you think was the original

right side up one? (Or, upside down one if you started seeing them as right side up first?) Some people seem to be assuming there is a particular one. But it's just which one you happen to see as different.

I find I can purposely change most of them. Only the one compartment ones, though. I haven't spent a lot of time trying, but so far can't easily, on demand, change the multi-compartment ones.

[Ohiya]

28. The middle one on the right flips them all for me.

[Dark n Stormy Knight]

31. Interesting. That was actually the original one that flipped for me.

But later I could manipulate others purposely.

[Martin Eden]

19. It worked on me

Pretty cool.

[USALiberal]

20. Cool

[NurseJackie]

21. Cool! It reminds me of the shiny legs illusion.

Once you unsee the illusion it won't return.

[robbob]

22. That is so cool!

I was having the same problem some have mentioned; once I saw the plates as right side up I couldn’t figure out how to make them look upside down again. Until...

I realized that, for me, all I had to do was read the top line of text (“All these plates are upside down...”), and then, glancing down at the picture, they would all be upside down once more. Wow. Is my brain REALLY that malleable? Explains a lot about Fox News addicts and their aversion to objective reality! Spend enough time having people tell you the plates are upside down and soon enough that’s all you can see, I guess...

[ProfessorGAC]

24. I Got It

That's really interesting.
Like you said, I saw the one bowl, and boom, they all looked normal.
Fun!

[TruckFump]

26. This is weird.

I can do three things with this picture:

1. See all as upside down;
2. See all as right side up; and
3. See some as upside down and some as right side up?

I did the third one after seeing 1. and then 2., and trying to get back to 1.

Blew me away.

[MrScorpio]

27. I can switch them back and forth at will

Not too hard at all

[matt819]

29. Wow

But are they blue or black?

[Talitha]

30. Some people have a similar experience looking at lunar craters.

We KNOW they're all concave.
But some folks see them as 'outies' instead of 'innies'.