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