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Dogs (Canis familiaris), but Not Chimpanzees (Pan troglodytes), Understand Imperative Pointing

By Katharina C. Kirchhofer, Felizitas Zimmermann, Juliane Kaminski, Michael Tomasello

Category Journal Articles
Abstract

Chimpanzees routinely follow the gaze of humans to outside targets. However, in most studies using object choice they fail to use communicative gestures (e.g. pointing) to find hidden food. Chimpanzees' failure to do this may be due to several difficulties with this paradigm. They may, for example, misinterpret the gesture as referring to the opaque cup instead of the hidden food. Or perhaps they do not understand informative communicative intentions. In contrast, dogs seem to be skilful in using human communicative cues in the context of finding food, but as of yet there is not much data showing whether they also use pointing in the context of finding non-food objects. Here we directly compare chimpanzees' (Nā€Š=ā€Š20) and dogs' (Nā€Š=ā€Š32) skills in using a communicative gesture directed at a visible object out of reach of the human but within reach of the subject. Pairs of objects were placed in view of and behind the subjects. The task was to retrieve the object the experimenter wanted. To indicate which one she desired, the experimenter pointed imperatively to it and directly rewarded the subject for handing over the correct one. While dogs performed well on this task, chimpanzees failed to identify the referent. Implications for great apes' and dogs' understanding of human communicative intentions are discussed.

Submitter

Marcy Wilhelm-South

Purdue University

Publication Title PLoS One
Volume 7
Issue 2
Pages 7
DOI 10.1371/journal.pone.0030913
URL https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0030913
Language English
Additional Language English
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Tags
  1. Animal roles
  2. Chimpanzees
  3. Decision making
  4. Dogs
  5. Domestic animals
  6. Gestures
  7. Human-animal interactions
  8. Learning
  9. open access
  10. peer-reviewed
  11. Pets and companion animals
Badges
  1. open access
  2. peer-reviewed