Animal Cognition

, Volume 12, Issue 1, pp 145–154 | Cite as

The discrimination of discrete and continuous amounts in African grey parrots (Psittacus erithacus)

  • Syrina Al Aïn
  • Nicolas Giret
  • Marion Grand
  • Michel Kreutzer
  • Dalila Bovet
Original Paper

Abstract

A wealth of research in infants and animals demonstrates discrimination of quantities, in some cases nonverbal numerical perception, and even elementary calculation capacities. We investigated the ability of three African grey parrots (Psittacus erithacus) to select the largest amount of food between two sets, either discrete food items (experiment 1) or as volume of a food substance (experiment 2). The two amounts were presented simultaneously and were visible at the time of choice. Parrots were tested several times for all possible combinations between 1 and 5 seeds or 0.2 and 1 ml of food substance. In both conditions, subjects performed above chance for almost all combinations. Accuracy was negatively correlated with the ratio, that is performance improved with greater differences between amounts. Therefore, these results with both individual items and volume discrimination suggest that parrots use an analogue of magnitude, rather than object-file mechanisms to quantify items and substances.

Keywords

African grey parrots (Psittacus erithacusAnalogue magnitude Substance Estimation of amounts 

References

  1. Addessi E, Crescimbene L, Visalberghi E (2008) Food and token quantity discrimination in capuchin monkeys (Cebus apella). Anim Cogn. doi:10.1007/s10071-007-0111-6
  2. Agrillo C, Dadda M (2007) Discrimination of the larger shoal in the poeciliid fish Girardinus falcatus. Ethol Ecol Evol 19:145–157Google Scholar
  3. Agrillo C, Dadda M, Bisazza A (2007) Quantity discrimination in female mosquitofish. Anim Cogn 10:63–70PubMedCrossRefGoogle Scholar
  4. Anderson US, Stoinski TS, Bloomsmith MA, Marr MJ, Smith A, Maple TL (2005) Relative numerousness judgment and summation in young and old western lowland gorillas. J Comp Psychol 119:285–295PubMedCrossRefGoogle Scholar
  5. Barner D, Wood J, Hauser M, Carey S (2008) Evidence for a non-linguistic distinction between singular and plural sets in rhesus monkeys. Cognition 107:603–622PubMedCrossRefGoogle Scholar
  6. Barth H, Kanwisher N, Spelke E (2003) The construction of large number representations in adults. Cognition 86:201–221PubMedCrossRefGoogle Scholar
  7. Beran MJ (2001) Summation and numerousness judgments of sequentially presented sets of items by chimpanzees (Pan troglodytes). J Comp Psychol 115:181–191PubMedCrossRefGoogle Scholar
  8. Beran MJ (2004) Chimpanzees (Pan troglodytes) respond to nonvisible sets after one-by-one addition and removal of items. J Comp Psychol 118:25–36PubMedCrossRefGoogle Scholar
  9. Beran MJ, Beran MM (2004) Chimpanzees remember the results of one-by-one addition of food items to sets over extended time periods. Psychol Sci 15:94–99PubMedCrossRefGoogle Scholar
  10. Brannon EM, Wusthoff CJ, Gallistel CR, Gibbon J (2001) Numerical subtraction in the pigeon: evidence for a linear subjective number scale. Psychol Sci 12:238–243PubMedCrossRefGoogle Scholar
  11. Call J (2000) Estimating and operating on discrete quantities in orangutans (Pongo pygmaeus). J Comp Psychol 114:136–147PubMedCrossRefGoogle Scholar
  12. Cantlon JF, Brannon EM (2006) Shared system for ordering small and large numbers in monkeys and humans. Psychol Sci 17:401–406PubMedCrossRefGoogle Scholar
  13. Creswell W, Quinn JL (2004) Faced with a choice, sparrowhawks more often attack the more vulnerable prey group. Oikos 104:71–76CrossRefGoogle Scholar
  14. Emery NJ, Clayton DH (2004) Comparing the complex cognition of birds and primates. In: Rogers LJ, Kaplan G (eds) Comparative vertebrate cognition: are primates superior to non-primates?. Kluwer Academic/Plenum Publishers, New YorkGoogle Scholar
  15. Emmerton J (2001) Birds’ judgments of number and quantity. In: Cook RG (ed) Avian visual cognition. Retrieved 17 March 2007. from http://www.pigeon.psy.tufts.edu/avc/emmerton/
  16. Emmerton J, Renner JC (2006) Scalar effects in the visual discrimination of numerosity by pigeons. Learn Behav 34:176–192PubMedGoogle Scholar
  17. Feigenson L, Carey S (2003) Tracking individuals via object files: evidence from infants’ manual search. Dev Sci 6:568–584CrossRefGoogle Scholar
  18. Feigenson L, Carey S, Hauser MD (2002) The representations underlying infants’ choice of more: object files versus analog magnitudes. Psychol Sci 13:150–156PubMedCrossRefGoogle Scholar
  19. Flombaum JI, Junge JA, Hauser MD (2005) Rhesus monkeys (Macaca mulatta) spontaneously compute addition operations over large numbers. Cognition 97:315–325PubMedCrossRefGoogle Scholar
  20. Gallistel CR, Gelman R (2000) Non-verbal numerical cognition: from the reals to the integers. Trends Cogn Sci 4:59–65PubMedCrossRefGoogle Scholar
  21. Giret N, Miklósi A, Kreutzer M, Bovet D (2008) Use of experimenter given cues by African grey parrots (Psittacus erithacus); Anim Cogn. doi:10.1007/s10071-008-0163-2
  22. Hanus D, Call J (2007) Discrete quantity judgments in the great apes (Pan paniscus, Pan troglodytes, Gorilla gorilla, Pongo pygmaeus): the effect of presenting whole sets versus item-by-item. J Comp Psychol 121:241–249PubMedCrossRefGoogle Scholar
  23. Hauser MD, Carey S (2003) Spontaneous representations of small numbers of objects by rhesus macaques: examinations of content and format. Cogn Psychol 47:367–401CrossRefGoogle Scholar
  24. Hauser MD, Carey S, Hauser LB (2000) Spontaneous number representation in semi-free-ranging rhesus monkeys. Proc Biol Sci 267:829–833PubMedCrossRefGoogle Scholar
  25. Hauser MD, Tsao F, Garcia P, Spelke E (2003) Evolutionary foundations of number: spontaneous representation of numerical magnitudes by cotton-top tamarins. Proc Biol Sci 270:1441–1446PubMedCrossRefGoogle Scholar
  26. Jordan KE, Brannon EM (2006) A common representational system governed by Weber’s law: nonverbal numerical similarity judgments in 6-year-olds and rhesus macaques. J Exp Child Psychol 95:215–229PubMedCrossRefGoogle Scholar
  27. Kilian A, Yaman S, von Fersen L, Güntürkün O (2003) A bottlenose dolphin discriminates visual stimuli differing in numerosity. Learn Behav 31:133–142PubMedGoogle Scholar
  28. Kitchen DM (2004) Alpha male black howler monkey responses to loud calls: effect of numeric odds, male companion behaviour and reproductive investment. Anim Behav 67:125–139CrossRefGoogle Scholar
  29. Lewis K, Jaffe S, Brannon E (2005) Analog number representations in mongoose lemurs (Eulemur mongoz): evidence from a search task. Anim Cogn 8:247–252PubMedCrossRefGoogle Scholar
  30. Luck SJ, Vogel EK (1997) The capacity of visual working memory for features and conjunctions. Nature 390:279–281PubMedCrossRefGoogle Scholar
  31. Lyon BE (2003) Egg recognition and counting reduce costs of avian conspecific brood parasitism. Nature 422:495–499PubMedCrossRefGoogle Scholar
  32. vanMarle K, Scholl BJ (2003) Attentive tracking of objects vs. substances. Psychol Sci 14:498–504PubMedCrossRefGoogle Scholar
  33. vanMarle K, Aw J, McCrink K, Santos L (2006) How Capuchin Monkeys (Cebus apella) quantify objects and substances. J Comp Psychol 120:416–426PubMedCrossRefGoogle Scholar
  34. McComb K, Packer C, Pusey A (1994) Roaring and numerical assessment in contests between groups of female lions, Panthera leo. Anim Behav 47:379–387CrossRefGoogle Scholar
  35. Mix K, Huttenlocher J, Levine SC (2002) Quantitative development in infancy and early childhood. Oxford University Press, New YorkGoogle Scholar
  36. Olthof A, Iden CM, Roberts WA (1997) Judgments of ordinality and summation of number symbols by squirrel monkeys (Saimiri sciureus). J Exp Psychol Anim Behav Process 23:325–339PubMedCrossRefGoogle Scholar
  37. Pepperberg IM (1994) Numerical competence in an African gray parrot (Psittacus erithacus). J Comp Psychol 108:36–44CrossRefGoogle Scholar
  38. Pepperberg IM (1999) The Alex studies: cognitive and communicative abilities of grey parrots. Harvard University Press, CambridgeGoogle Scholar
  39. Pepperberg IM (2006a) Grey parrot numerical competence: a review. Anim Cogn 9:377–391PubMedCrossRefGoogle Scholar
  40. Pepperberg IM (2006b) Ordinality and inferential abilities of a grey parrot (Psittacus erithacus). J Comp Psychol 120:205–216PubMedCrossRefGoogle Scholar
  41. Pepperberg IM, Brezinsky MV (1991) Acquisition of a relative class concept by an African grey parrot (Psittacus erithacus): discriminations based on relative size. J Comp Psychol 105:286–294PubMedCrossRefGoogle Scholar
  42. Pepperberg IM, Gordon JD (2005) Number comprehension by a grey parrot (Psittacus erithacus), including a zero-like concept. J Comp Psychol 119:197–209PubMedCrossRefGoogle Scholar
  43. Pérusse R, Rumbaugh D (1990) Summation in chimpanzees (Pan troglodytes): effects of amounts, number of wells, and finer ratios. Int J Primatol 11:425–437CrossRefGoogle Scholar
  44. Santos L, Barnes J, Mahajan N (2005) Expectations about numerical events in four lemur species (Eulemur fulvus, Eulemur mongoz, Lemur catta and Varecia rubra). Anim Cogn 8:253–262PubMedCrossRefGoogle Scholar
  45. Smirnova AA, Lazareva OF, Zorina ZA (2000) Use of number by crows investigation by matching and oddity learning. J Exp Anal Behav 73:163–176PubMedCrossRefGoogle Scholar
  46. Stevens J, Wood J, Hauser M (2007) When quantity trumps number: discrimination experiments in cotton-top tamarins (Saguinus oedipus) and common marmosets (Callithrix jacchus). Anim Cogn 10:429–437PubMedCrossRefGoogle Scholar
  47. Uller C, Carey S, Huntley-Fenner G, Klatt L (1999) What representations might underlie infant numerical knowledge? Cogn Dev 14:1–36CrossRefGoogle Scholar
  48. Uller C, Jaeger R, Guidry G, Martin C (2003) Salamanders (Plethodon cinereus) go for more: rudiments of number in an amphibian. Anim Cogn 6:105–112PubMedGoogle Scholar
  49. Ward C, Smuts B (2007) Quantity-based judgments in the domestic dog (Canis lupus familiaris). Anim Cogn 10:71–80PubMedCrossRefGoogle Scholar
  50. Wilson ML, Hauser MD, Wrangham RW (2001) Does participation in intergroup conflict depend on numerical assessment, range location, or rank for wild chimpanzees? Anim Behav 61:1203–1216CrossRefGoogle Scholar
  51. Wood JN, Hauser MD, Glynn DD, Barner D (2008) Free-ranging rhesus monkeys spontaneously individuate and enumerate small numbers of non-solid portions. Cognition 106:207–221PubMedCrossRefGoogle Scholar
  52. Xu F (2003) Numerosity discrimination in infants: evidence for two systems of representations. Cognition 89:15–25CrossRefGoogle Scholar
  53. Xu F, Spelke ES, Goddard S (2005) Number sense in human infants. Dev Sci 8:88–101PubMedCrossRefGoogle Scholar
  54. Zorina ZA, Smirnova AA (1994) Relative numerousness judgments in pigeons and crows: the choice of the greater set of food items under the freefeeding situation (in Russian). Zh Vyssh Nerv Deiat 44:618–621Google Scholar
  55. Zorina ZA, Smirnova AA (1996) Quantitative evaluations in gray crows: generalization of the relative attribute “larger set”. Neurosci Behav Physiol 26:357–364PubMedCrossRefGoogle Scholar

Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  • Syrina Al Aïn
    • 1
  • Nicolas Giret
    • 1
  • Marion Grand
    • 1
  • Michel Kreutzer
    • 1
  • Dalila Bovet
    • 1
  1. 1.Laboratoire d’Ethologie et de Cognition ComparéeUniversité Paris X-NanterreNanterre cedexFrance

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