Encyclopedia of Animal Cognition and Behavior

Living Edition
| Editors: Jennifer Vonk, Todd Shackelford

Morgan’s Canon

  • Roger K. ThomasEmail author
Living reference work entry
DOI: https://doi.org/10.1007/978-3-319-47829-6_495-1

Synonyms

Introduction

“Perhaps the most quoted statement in the history of comparative psychology is Lloyd Morgan’s canon” (Dewsbury 1984, p. 187). “To this it can be added that perhaps the most misrepresented statement in the history of comparative psychology is Lloyd Morgan’s canon” (Thomas 1998, p. 158). Conwy Lloyd Morgan (1852–1936) did not refer to it as a “canon” but as a “principle.” However, it quickly became known as “Morgan’s canon,” and that is how it will be identified here, unless Morgan is being quoted. Morgan’s canon was intended to guide choice among alternative explanations of animal behavior. This entry emphasizes at least 12 decades of misrepresentation of Morgan’s canon as a guide and provides fundamental guidelines for constructing the best explanations in animal cognition and psychological science.

Morgan’s Canon

The most cited version of Morgan’s canon is in his Introduction to Comparative Psychology (Morgan 1894, p. 53):

In no case may we...

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References

  1. Bunge, M. (1963). The myth of simplicity: Problems of scientific philosophy. Englewood Cliffs: Prentice Hall.CrossRefGoogle Scholar
  2. Costall, A. (1993). How Lloyd Morgan’s canon backfired. Journal of the History of the Behavioral Sciences, 29, 113–122.CrossRefGoogle Scholar
  3. Dewsbury, D. A. (1984). Comparative psychology in the twentieth century. Stroudsburg: Hutchinson Ross Publishing Co.CrossRefGoogle Scholar
  4. Diamond, I. T. (1979). The subdivisions of neocortex: A proposal to revise the traditional view of sensory, motor, and association cortex. In J. M. Spague & A. Epstein (Eds.), Progress in psychobiology and physiological psychology (Vol. 8, pp. 1–43). New York: Academic Press.Google Scholar
  5. Fitzpatrick, S. (2015). Simplicity in the philosophy or science. Internet encyclopedia of philosophy. https://www.iep.utm.edu/simplici/
  6. Guyer, M. F. (1931). Animal biology. New York: Harper & Row.Google Scholar
  7. Hamilton, W. (1855). Discussions on philosophy and literature. New York: Harper & Brothers Publishers.Google Scholar
  8. Karin-D’Arcy, M. R. (2005). The modern role of Morgan’s canon in comparative psychology. International Journal of Comparative Psychology, 18, 179–201.Google Scholar
  9. McCorquodale, K., & Meehl, P. E. (1948). On a distinction between intervening variables and hypothetical constructions. Psychological Review, 55, 95–107.CrossRefGoogle Scholar
  10. Moody, E. A. (1967). William of Ockham. In P. Edwards (Ed.), The encyclopedia of philosophy: volume 8 (pp. 308–317). New York: Macmillan Publishing Co.Google Scholar
  11. Morgan, C. L. (1891). Animal life and intelligence. Boston: Ginn & Company Publishers.CrossRefGoogle Scholar
  12. Morgan, C. L. (1894). An introduction to comparative psychology. London: The Walter Scott Publishing Co.CrossRefGoogle Scholar
  13. Morgan, C. L. (1903). An introduction to comparative psychology. (New ed. Revised). London: The Walter Scott Publishing Co.Google Scholar
  14. Pearson, K. (1892). The grammar of science. London: Walter Scott.CrossRefGoogle Scholar
  15. Romanes, G. J. (1882). Animal intelligence. London: K. Paul, Trench.Google Scholar
  16. Romanes, G. J. (1883). Mental evolution in animals. London: K. Paul, Trench.Google Scholar
  17. Scorzato, L. (2013). On the role of simplicity in science. Synthese, 190, 2867–2895.  https://doi.org/10.1007/s11229-012-0101-3.CrossRefGoogle Scholar
  18. Shettleworth, S. J. (2010). Clever animals and killjoy explanations in comparative psychology. Trends in Cognitive Sciences, 14, 477–481.  https://doi.org/10.1016/j.tics.2010.07.002.CrossRefPubMedGoogle Scholar
  19. Sober, E. (2015). Ockham’s razors: A user’s manual. Cambridge: Cambridge University Press.CrossRefGoogle Scholar
  20. Thomas, R. K. (1996). Investigating cognitive abilities in animals: Unrealized potential. Cognitive Brain Research, 3, 157–166.CrossRefGoogle Scholar
  21. Thomas, R. K. (1998). Lloyd Morgan’s canon. In G. Greenberg & M. M. Haraway (Eds.), Comparative psychology: A handbook (pp. 156–163). New York: Garland Publishing Co.Google Scholar
  22. Thomas, R. K. (1999). Hazards of “emergentism” in psychology. Contribution to symposium. Controversial issues in psychology: The role of emergent processes, held in conjunction with the annual meeting of the Southern Society for Philosophy and Psychology, Louisville. https://faculty.franklin.uga.edu/rkthomas/sites/faculty.franklin.uga.edu.rkthomas/files/Hazards%20of%20Emergentism.pdf
  23. Thomas, R. K. (2001). Lloyd Morgan’s canon: A history of its misrepresentation. Department of Psychology records, 1932–2012, University of Georgia Archives, Hargrett Rare Book & Manuscript Library (Box 6A, Folder 11), University of Georgia Libraries, Athens. A PDF of this unpublished manuscript may be requested from the author by email: rkthomas@uga.edu
  24. Thomas, R. K. (2007). Recurring errors among recent history of psychology textbooks. American Journal of Psychology, 120, 477–495.PubMedGoogle Scholar
  25. Wozniak, R. H. (1993). Conwy Lloyd Morgan, mental evolution, and Introduction to comparative psychology. In C. L. Morgan (Ed.), Introduction to comparative psychology. London: Routledge/Thoemmes Press. (Original work published 1894).Google Scholar

Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Department of PsychologyUniversity of GeorgiaAthensUSA

Section editors and affiliations

  • Douglas Sellers
    • 1
  1. 1.Penn State Worthington ScrantonScrantonUSA