Cross-cultural studies in the perception and attention span of art appreciation may shed some light on the differences and similarities of the compared cultures. In fact, if one views art history as an evolution from literal naturalism to abstract clarification of aesthetic principles of universal order and harmony, then one may devise a theoretical growth scale of this evolutionary process in the arts and identify where a culture's art falls on this continuum. Gestalt therapy attempts to get the client to feel unified and whole as a person.
Art attempts to get the observer to feel visual unity.
The more and differently angled lines one places in a drawing, the more chance the drawing will have a 3-dimensional quality to it. Almost instantaneously we are processing information of the whole piece of art. A conscious prediction is made that the next rest position of the central vision will provide further important information about what is already known about the work from earlier visual data and experience. Without some purpose we stop looking at the work of art. This occurs when the bundle of sequential glances don't add up, or is difficult to formulate a consistent visual structure or schema.