The Muller-Lyer Illusion is a powerful optical illusion that can be used to demonstrate how our visual perception can be distorted. The illusion is caused by contrasting colors on straight lines which ...

An optical illusion is a puzzle in which the image in front of you possesses a different perception. These illusions are given in different forms, like puzzles, crossing numbers, hidden items, jumbled ...

Commenting on your March 29, 2006, article on Boston, which relates the Aspen Institute and Annenberg Institute for School Reform’s finding that test-score improvements in Boston have “tapered off in ...