Behavioral and Brain Sciences

Short Communication

Does perception replicate the external world?

Donald D. Hoffman a1
a1 Department of Cognitive Science, University of California at Irvine, Irvine, CA 92697


Vision scientists standardly assume that the goal of vision is to recover properties of the external world. Lehar's “miniature, virtual-reality replica of the external world inside our head” (target article, sect. 10) is an example of this assumption. I propose instead, on evolutionary grounds, that the goal of vision is simply to provide a useful user interface to the external world.