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