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Steve Stewart-Williams @SteveStuWill
THREAD: My Top 12 Favourite Perceptual Illusions 1. A great example of how expectations guide perception. pic.twitter.com/DIqwOqAaRK
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Steve Stewart-Williams @SteveStuWill
4. This isn't a GIF – the movement is all in your head. pic.twitter.com/8A9pJigPri
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Steve Stewart-Williams @SteveStuWill
5. This looks two photos of the same road, taken from different angles. But it’s just the same photo twice. blogs.scientificamerican.com/illusion-chase… pic.twitter.com/hb5I3kPr87
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Steve Stewart-Williams @SteveStuWill
6. We don't directly perceive how light or dark objects are; the perceptual system makes an educated "guess" based on the lightness or darkness of the surroundings. twitter.com/AkiyoshiKitaok… HT @AkiyoshiKitaoka pic.twitter.com/Uo3U291WLw
Steve Stewart-Williams @SteveStuWill
8. The Dynamic Müller-Lyer Illusion: The vertical black, green, and blue lines don't change size. giannisarcone.com/Muller_lyer_il… pic.twitter.com/duaY20axxE
Steve Stewart-Williams @SteveStuWill
10. Rotating Rings: Every time you switch from looking at one wheel to looking at the other, they both change direction. buzzfeed.com/kellyoakes/cap… pic.twitter.com/682GbM9KyK
Steve Stewart-Williams @SteveStuWill
11. The Spinning Dancer en.wikipedia.org/wiki/Spinning_… If you look at the dancer on the left and the one in the middle, the one in the middle spins clockwise. If you look at the dancer on the *right* and the one in the middle, the one in the middle spins counterclockwise. pic.twitter.com/UJpbpNcXHA
Steve Stewart-Williams @SteveStuWill
12. Stare at the centre of the top image for 20 seconds then look at the bottom image... pic.twitter.com/l40EbUBwIL
Steve Stewart-Williams @SteveStuWill
Another classic: Most people can "hear" this GIF, even though it's silent. In effect, the GIF induces a mild auditory hallucination. telegraph.co.uk/news/2017/12/0… HT @IamHappyToast pic.twitter.com/VVGD7xz7Xo
Abhiram @never_ram
@SteveStuWill I would like to add my favourite illusion. * Put your nose to the screen. * Stare at the image for several seconds. * Start to pull back slowly.. pic.twitter.com/63p1Tba1dW
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feathers @featherfusions
@HenjohnsonHenry @never_ram @SteveStuWill Hubby can’t see them so legit believes everyone who can is lying 🤣
Solona Armstrong @solonaarmstrong
@lucidillusions_ @featherfusions @HenjohnsonHenry @never_ram @SteveStuWill The trick is to "cross" your eyes. If you look at an item that is close to you and then look past it at an object further in the distance, the close object appears double, right? It's the same kind of thing with these optical illusions.
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