Find out how to get started with Scratch.
Instead, you saw a bluish-green ball inside the flask, because the red cones were still too tired from looking at the red ball to transmit information. It's not always the same thing!
Stare hard at the red ball for about 20 seconds, then look at the empty flask, letting your eyes go a bit unfocused. To give it a try, look first at the airplane image. Try printing it out on a color printer and it will still work. You may wish to graph the data. Pretty cool, huh?
Have you created your own visual illusions? You are seeing something that is not really there! Create the data sheets you will use to record your observations.
Allocate the same amount of time for the viewing of each picture and for the written responses. Get the Scoop on Stroop : The color of text makes it harder for people to correctly read the typed name of a color. The artist confuses his viewer by changing they way our brain is used to seeing things.