Comparing dogs and great apes in their ability to visually track object transpositions |
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Authors: | Eveline F Rooijakkers Juliane Kaminski Josep Call |
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Institution: | (1) Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, 04103 Leipzig, Germany;(2) Department of Behavioural Biology, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands;(3) Sub Department of Animal Behaviour, University of Cambridge, High Street, Madingley, Cambridge, CB3 8AA, UK; |
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Abstract: | Knowing that objects continue to exist after disappearing from sight and tracking invisible object displacements are two basic
elements of spatial cognition. The current study compares dogs and apes in an invisible transposition task. Food was hidden
under one of two cups in full view of the subject. After that both cups were displaced, systematically varying two main factors,
whether cups were crossed during displacement and whether the cups were substituted by the other cup or instead cups were
moved to new locations. While the apes were successful in all conditions, the dogs had a strong preference to approach the
location where they last saw the reward, especially if this location remained filled. In addition, dogs seem to have especial
difficulties to track the reward when both containers crossed their path during displacement. These results confirm the substantial
difference that exists between great apes and dogs with regard to mental representation abilities required to track the invisible
displacements of objects. |
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