In science, the "Mona Lisa Effect" refers to the impression that the eyes of the person portrayed in an image seem to follow the viewer as they move in front of the picture. Two researchers from the Cluster of Excellence Cognitive Interaction Technology (CITEC) at Bielefeld University demonstrate that, ironically enough, this effect does not occur with Leonardo da Vinci's world-famous painting "Mona Lisa—debunking a scientific legend. The researchers are presenting the results of their study in the scientific journal i-Perception.