Perceptual Simplicity: The True Role of Prägnanz and Occam

Summary In recent years, the concept of simplicity in perception has acquired a leading role, above all thanks to scholars linked to Bayesian modeling and to theories like structural information theory derived from information theory. Unfortunately, two misleading ideas made their way into the discussion: that in perception, simplicity is equivalent to Prägnanz and that Occam’s razor plays a role in the simplicity of percepts. Here it is shown that in Gestalt theory, simplicity is only one of the factors of Prägnanz and that the use of Occam’s razor is improper, because it applies only to the theories that generate, in this case, a percept, and not to the product of the theory.