Figure-Ground
This video presents the same text shown beside it, spoken and on screen. It adds nothing the text does not say.
State
Figure-ground organization is the perceptual separation of an object from the background it sits against.
Show
A reversible image alternates between two faces and a vase, and never shows both at once.
Watch for
Figure-ground assignment is automatic and unstable. It cannot be suspended by deciding to see both.