Fixate the red square in the center of the diagram as the black bars move down.

When the black bars stop moving down, continue to fixate the red square
and pay attention to the black bars.

What if anything do the black bars appear to be doing?  If they do not
appear to do anything, try running the demonstration again by clicking on the refresh icon at the top of your screen.

If the black bars appeared to be drifting upwards you witnessed the motion
after effect.

If you have a slow computer, a 486 machine or older, this demo may not work very well and you won't experience the MAE.

This demonstration was produced by Dr. Ben Bauer of the Trent University. 

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