figure and ground
the tendency for one part of an image to be perceived as the focus, and another part to be ignored as background
grouping
elements in a particular configuration are perceived in groups, rather than as individual elements
proximity
varying proximities between elements cause them to be perceived as distinct groups
closure
detached elements can suggest the existence of a continuous shape where there is none
similarity
elements that share characteristics are perceived as distinct groups
common fate
elements appearing to be moving in the same direction are perceived as a group
law of past experience
personal experience and cultural phenomena influence how stimuli are perceived