Misperceptions of Colors - Ted Adelson Feedback Illusion - Swivel Silhouette - Nobuyuki Kayahara Multilayered Images - Joseph Jastro - Duck Or A Rabbit? Rotating Silhouette In Both Directions Multilayered Pictures - Girl Or An Old Woman? Optical Illusion Against Stress Titchener Circles - Ebbinghaus Illusionc Dots In Grid - Hermann's Illusion The Rotating Circlet Test For Stress "Rotating Snakes" - Akiyoshi Kitaoka