BTW, the Neuroquest in this Feb issue of Discover magazine is about this very thing. Click here to see it yourself. (DISCOVER Vol. 25 No. 02 | February 2004 | Mind & Brain)





In case the article goes away, a CG rubix-like cube is displayed twice, once under yellow light, once under blue. An arrow points to a blue-looking square in the first image, then to a yellow one. They turn out to be the same shade of grey actually.