Eric Saidel (George Washington University)
According to Povinelli and Eddy (1996) chimpanzees do not know very much about seeing. Specifically, they do not know what others can and cannot see. According Hare et al (2000, 2001) chimpanzees know what other chimpanzees can see. How can we resolve this puzzle? This paper argues that the answer lies in a modification of Flavell's (1974, 1977) levels of visual perspective taking in order to take into account that recognizing that another does not see an object requires different cognitive mechanisms than recognizing that another does see an object.
