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 [email protected]


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.