of human language use.
Finally, the great gulf between research with humans and nonhumans has its basis in religious and humanistic philosophies that set humans apart from other animals in ways that are convenient for our purposes. Certainly, important differences exist that should not be underestimated. But, perhaps in an effort to justify our superiority over other life forms, we have tended to ignore or even deny many important similarities. While this denial is self serving, it is not becoming of the image we have of ourselves as objective scientist. A better appreciation of the similarities between us and other animals can only benefit our attempt to understand our own capacities and limitations.
The research described in this chapter was supported by National Institute of Mental Health Grants MH 35376 and MH 45979, and by National Science Foundation Grants BNS 8418275, RII 8902792, BNS 9019080, and IBN 9414589. Important contributions to the research were provided by Peter J. Urcuioli, David E. Hogan, Charles A. Edwards, Joyce A. Jagielo, Pamela Jackson-Smith, Janice N. Steirn, Lou M. Sherburne, Karen L. Roper, and Daren H. Kaiser.
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