On a 2-choice elevated maze, blinded female rats learned to detect from the choice point, a barrier which blocks a path to the goal and to avoid that path, but when hearing was impaired performance dropped almost to chance. This and other tests supported the conclusion that "the ability of rats to echolocate may be the basis of some performances which have been attributed to visual discrimination." (PsycINFO Database Record (c) 2006 APA, all rights reserved)