Some visual tricks

Yesterday a co-worker showed me some visual cognitive tricks -- for lack of a ''smoother'' term -- on the web.


First one: Can you see the difference?

http://www.spiegel.de/wissenschaft/mensch/0,1518,grossbild-510125-372161,00.html


Second one: I can see some college students (either majoring in Psych, or Drama) pulling this one off some weekend.

http://viscog.beckman.uiuc.edu/grafs/demos/12.html


Third one: Various ''continuity'' tricks (continuity -- the bane of film-makers!). Apparently, only aobut 30% of the population picks up on these.

http://viscog.beckman.uiuc.edu/djs_lab/demos.html


--GG