Abstract
A breeding orangutan pair was given free access to a simultaneous light-dark discrimination problem. Contingencies were reversed after 20 consecutive correct responses. Surprisingly systematic results were obtained without typical laboratory isolation. There was a dramatic increase in responses to criterion beginning with the first reversal. This increase was evident for the first ten reversals. In keeping with laboratory results, a marked shift toward decreasing numbers of responses required for reversals was followed by relative stability. Orangutans demonstrate excellent capability on this relatively simple task, yet do not achieve consistent “perfect” reversal behavior. Thelevel of responding is influenced but not the overall shape of the learning curve, suggesting that the stable performance level is a function of environmental complexity as well as species capability.
References
Boycott, B. B. &J. C. Young, 1959. Reversal of learned responses inOctopus vulgaris.Anim. Behav., 6: 45–52.
Essock, S. M. &D. M. Rumbaugh, 1977. The development and measurement of cognitive capabilities in captive non-human primates. In:The Behavior of Captive Wild Animals,H. Markowitz &V. Stevens (eds.), Nelson Hall, Chicago.
Gossette, R. L., 1973. Comparative analysis of serial discrimination reversal (SDR) performances of the gibbon,Hylobates lar. In:Gibbon and Siamang, Vol. 2,D. Rumbaugh (ed.), S. Karger, New York, pp. 208–220.
Harlow, H., 1949. The formation of learning sets.Psych. Review, 56: 51–65.
————, 1959. Learning set and error factor theory. In:Psychology: A Study of a Science,S. Koch (ed.), McGraw-Hill, New York, pp. 492–537.
Krechevsky, I., 1933. Hereditary nature of “hypotheses”.J. Comp. Psych., 16: 99–116.
Markowitz, H., 1973. Biological and behavioral research with captive exotic animals. Paper presented at the American Psychological Association meetings, Montreal.
————, 1974. New methods for increasing activity in zoo animals: Some results and proposals for the future. In:Centennial Symposium on Science and Research, Penrose Institute, Philadelphia Zoological Gardens, Hill's Division, Riviana Foods, Topeka.
————, 1975. Analysis and control of behavior in the zoo. In:Research in Zoos and Aquariums, National Academy of Sciences, Washington.
————, 1969. Superiority of “maze-dull” animals on visual tasks in an automated maze.Psychon. Sci., 17(5): 171–172.
————, 1969. Performance of “maze-bright” and “maze-dull” rats in an automated visual discrimination task.Psychon. Sci., 15(3): 257–258.
————, 1977. Experimental analysis and control of group behavior. In:The Behavior of Captive Wild Animals,H. Markowitz &V. Stevens (eds.), Nelson Hall, Chicago.
Neuringer, A., 1969. Animals respond for food in the presence of free food.Science, 166 (3903): 339–341.
Robustelli, F., J. L. McGaugh, &D. Bovet, 1963. Relationship between avoidance conditioning and maze learning.Psych. Rep., 13: 103–106.
Rowland, G. L. &P. J. Woods, 1961. Performance of the tryon bright and full strains under two conditions in a multiple T-maze.Can. J. Psych., 15: 20–28.
Rumbaugh, D. M., 1970. Learning skills of anthropoids. In:Primate Behavior: Developments in Field and Laboratory Research, Vol. 1,Rosenblum (ed.), Academic Press, New York, pp. 1–70.
---- T. V. Gill, 1971. The learning skills ofPongo. In:Proceedings of the Third International Congress of Primatology, 3: 158–163.
Schusterman, R. J., 1964. Successive discrimination-reversal training and multiple discrimination training in one-trial learning by chimpanzees.J. Comp. Physiol. Psychol., 58: 153–156.
Snyder, D., L. Birchette, & T. Achenbach, 1976. A comparative study of cognitive performance byHylobates lar, Cebus apella, andMacaca mulatta. Paper read at the Sixth Congress of the International Primatological Society, Cambridge, England.
Stevens, V., 1977. Basic operant research in the zoo. In:The Behavior of Captive Wild Animals,H. Markowitz &V. Stevens (eds.), Nelson Hall, Chicago.
Author information
Authors and Affiliations
About this article
Cite this article
Davis, R.R., Markowitz, H. Orangutan performance on a light-dark reversal discrimination in the zoo. Primates 19, 755–759 (1978). https://doi.org/10.1007/BF02373641
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF02373641