DeValois' Checkerboard

The display shows two modulating squares placed within checkerboard patterns. The eight squares surrounding the modulating fields have the same averaged luminance, but on the left checkerboard the four squares with contiguous edges are white, and on the right checkerboard they are black.

What to notice: The squares appear primarily to modulate out of phase with each other.

 

 

 

© Arthur Shapiro 2004