A Chimpanzee named Megan, recognizing herself in a mirror


Gordon G. Gallup, Jr., then of Tulane University and currently of the State University of New York at Albany, prepares an anesthetized chimpanzee for the first formal test of self-recognition in a non-human. Since then (the late 1960's) this procedure has come to be known as the "Mark Test."





Yours truly teaching a simultaneous match-to-sample task to a young chimpanzee. No, it is not uncommon for young chimpanzees to suck their thumbs!




No, it wasn't all work and no play for either the chimpanzees or the researchers. Here, Megan and I take a little time out for a game of tickle and "find the cookies."


The seven chimpanzees I spent a number of years working with intensively. The results of the work with these animals can be found in: Povinelli, D.J. & Eddy, T.J. (1996). What young chimpanzees know about seeing. Monographs of the Society for Research in Child Development, 61 (2, Serial No. 247).


When working with chimpanzees, it is sometimes difficult to determine just who is studying who. I think this picture captures that sentiment perfectly.