Perception and Gestalt
The term "Gestalt" means "whole" or "form." Gestalt psychology describes several principles of organization to explain sensation and perception as the process of grouping individual parts into a more meaningful whole You probably have seen Federal Express trucks rushing to deliver packages, but have you ever noticed the arrow shape in between the "E" and "x" letters? If not, go take at the log on their web site, or you may even have a package or letter laying around. See if you can spot the arrow.