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