In the classic faces-vase drawing, it is possible to see either the faces or the vase, and this perception of a single image in two different ways is called:

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The term used to describe the phenomenon of seeing a single image in two different ways is figure-ground reversal. In the classic faces-vase drawing, the viewer can perceive either the faces or the vase as the figure, while the other aspect becomes the background. Induced motion refers to the perception of motion in a stationary object due to surrounding visual stimuli, motion parallax is the perception of objects moving at different speeds due to their distance from the observer, and stereoscopic vision is the perception of depth and dimensionality based on the slightly different images seen by each eye.

In the Classic Faces-Vase Drawing, It Is Possible to See