Elsevier

Animal Behaviour

Volume 54, Issue 4, October 1997, Pages 817-831
Animal Behaviour

Regular Article
Push or pull: an experimental study on imitation in marmosets

https://doi.org/10.1006/anbe.1996.0497Get rights and content

Abstract

A laboratory experiment was conducted in order to explore the possibility of imitation, that is, response learning by observation, in marmosets,Callithrix jacchusInexperienced individuals were allowed to observe a skilful model that demonstrated one of two possible techniques (pushing or pulling a pendulum-door) to get food from inside a wooden box. Their initial manipulative actions, performed when exposed to the box in a subsequent test, were compared with those of naive control subjects (non-observers). The observers showed less exploratory behaviour than the non-observers and, more importantly, some showed a strong tendency to use the demonstrated opening technique in the initial test phase. This initial preference disappeared in the course of five test sessions and the observers converged towards the simpler, alternative solution that was generally preferred by the non-observers. Despite fundamental individual differences in the observer group and the failure to find a significant group effect, the results indicate that marmosets are capable of learning simple motor skills through conspecific observation.

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    Correspondence: L. Huber, Department of Theoretical Biology, Institute of Zoology, University of Vienna, Biocenter, Althanstrasse 14, A-1090 Vienna, Austria (email: [email protected]).

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