stepping feet illusion (English, noun)
expansion: stepping feet illusion (plural stepping feet illusions)
Senses:
glosses: An optical illusion of motion perception involving two "buses" (rectangles), one blue and one yellow, moving horizontally across a "street" of black and white stripes. Although both buses move at a constant speed, their perceived speed varies dramatically, because of differing contrast levels.
Forms:
form: stepping feet illusions
tags: plural