Hybrid motion consists of an array of rectangles that change color in time (for instance, from yellow to blue to yellow to blue, etc.). The rectangles always remain in the same place, but the array appears to move to the left when the observer is close to the monitor and appears to move to the right when the observer is far away from the monitor. The illusion is based on vision science research concerning how the brain constructs motion. In hybrid motion, the brain processes that respond to coarse-scale information and brain processes that respond to fine-scale information report motion in different directions.
American University, USA
(© 2014 Arthur G. Shapiro & Oliver Flynn)