Look at the following animated gif:

http://nivea.psycho.univ-paris5.fr/A...kayakflick.gif

There should be two pictures that alternate. There is an interesting phonemenon that affects the majority of people, they will not be able to immediatly see the change between the two frames. When they realise what is changing it will become incredibly obvious.

Have a go, tell me if it works/how long it takes you.

Uhm, am I missing something, or is this too obvious ?!?!?!?
I see one thing that's different (saw that in the second time the frames came by) , are there more?

i saw one thing too

Took me about 10 seconds to figure out whats changing, pretty cool :)

Yeah, i spotted it within 4 changes

...we set out to test this idea by having subjects look at natural scenes where a large change suddenly occurs. Usually under such circumstances the change will be immediately seen because the visual transient that it produces pulls processing ressources to the change location. But by the use of special techniques (such as "flicker" or "mudsplashes"), or by making the change simultaneous with an eye saccade, the visual transient is swamped by other transients, and attention is not drawn to the change location. Our results show that in these circumstances, very large changes can be missed, confirming that in a certain sense, our impression of seeing everything is an illusion.

kewl
took about 15 times with my old eyes
kept looking at the lady
oh, dear :-(

Very cool. Damn, took me a few flicks before I saw it. The explanation is very interresting.

Nice post.

Cheerz
Dave

It's just the mountain disapearing, right?

Very cool. First I noticed the change in the light on the girls face, then... Ah Hah!