At first glance, the spinning dancer looks just like an ordinary image of a woman doing a pirouette. However, for most, after enough observation, the tiny figure suddenly switches the direction of her dance. For over a decade this illusion has had viewers doubting their sanity, but in actuality, the figure’s directional change has little to do with the brain and everything to do with our vision. VISUAL PREFERENCE The spinning dancer was created by Japanese web designer Nobuyuki Kayahara in 2003, and since the early 2000s, it has gained popularity as a way to determine whether or not people are right-brain (creative) or left-brain (logical) dominant. Viewers are told that if they view the dancer as standing on her left leg and spinning clockwise, then they are right-brain dominant, and if they see the reverse (the dancer standing on her right leg and spinning counter-clockwise), then they are left-brain dominant.