Optical illusions are surprising and fascinating. Spirals that aren't spirals, scintillating grids, red parrots that turn green and crosses that disappear are just some of the many examples in this box. The are fun to look at, alone or in a group. On the backside each card shows interesting facts about neurophysiological effects and the psychology of perception. When we see something that isn't actually there, that there is something wrong with our sight. Rather, these phenomena go back to mechanisms that usually help us fill in the gaps left by the eyes and put together a whole picture.
Each of the 60 cards shows an optical illusion on the front. On the back there is a short explanation how the illusion works and what scienctists can learn from this.
130 x 173 x 50 mm, 5.1 x 6.2 x 2.0 inch
ca. 8,000 words
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