Chimpanzees (Pan troglodytes) and bonobos (Pan paniscus) quantify split solid objects

Trix Cacchione*, Christine Hrubesch, Josep Call

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Recent research suggests that gorillas' and orangutans' object representations survive cohesion violations (e.g., a split of a solid object into two halves), but that their processing of quantities may be affected by them. We assessed chimpanzees' (Pan troglodytes) and bonobos' (Pan paniscus) reactions to various fission events in the same series of action tasks modelled after infant studies previously run on gorillas and orangutans (Cacchione and Call in Cognition 116:193-203, 2010b). Results showed that all four non-human great ape species managed to quantify split objects but that their performance varied as a function of the non-cohesiveness produced in the splitting event. Spatial ambiguity and shape invariance had the greatest impact on apes' ability to represent and quantify objects. Further, we observed species differences with gorillas performing lower than other species. Finally, we detected a substantial age effect, with ape infants below 6 years of age being outperformed by both juvenile/adolescent and adult apes.

Original languageEnglish
Pages (from-to)1-10
Number of pages10
JournalAnimal Cognition
Volume16
Issue number1
DOIs
Publication statusPublished - Jan 2013

Keywords

  • Core knowledge
  • Object representation
  • Cognitive development
  • Comparative cognition
  • Cohesiveness and continuity
  • BY-ONE ADDITION
  • PONGO-PYGMAEUS
  • GREAT APES
  • GORILLA-GORILLA
  • TABLE TASK
  • SETS
  • KNOWLEDGE
  • FOOD
  • REPRESENTATIONS
  • PERSISTENCE

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