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