See how top-down processing affects perception... Can you count how many passes the white-shirted players make in this basketball video? (It's on YouTube, so it may not work in school. You can get to it at home on this link http://youtu.be/IGQmdoK_ZfY if the embedded video doesn't work)
Which way is this dancer spinning?
Clockwise or counter clockwise?
This site shows you how the illusion works http://ofb.net/~whuang/imgs/spin/
Which is the front and which is the back of the Necker Cube? It gets really interesting when you add a dog and a scuba diver... (click here)
Subliminal messages? How effective are they?
Democrats accused Republicans of putting a subliminal message into this Bush campaign commercial? Do you think it was intentional? Do you think it would have an effect? Click here if the embedded video isn't working http://youtu.be/2NPKxhfFQMs
These "TED Talks" can give us great insights into attention and color perception.
Cognitive Scientist Beau Lotto studies color perception in humans and bees.
Here is the link if the embedded video isn't working for you. http://www.ted.com/talks/beau_lotto_optical_illusions_show_how_we_see.html
Apollo Robbins is a skilled pick-pocket who shows us a thing or two about attention.