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The nature of mental representation of others plays a crucial role in social interactions. Dogs present an ideal model species for the investigation of such mental representations because they develop social ties with both conspecifics and heterospecifics. Former studies found that dogs’ preference for larger food quantity could be reversed by humans who indicate the smaller quantity. The question is whether this social bias is restricted to human partners. We suggest that after a short positive social experience, an unfamiliar moving inanimate agent (UMO) can also change dogs’ choice between two food quantities. We tested four groups of dogs with different partners: In the (1)  Helper UMO  and (2)  Helper UMO Control  groups the partner was an interactive remote control car that helped the dog to obtain an otherwise unreachable food. In the (3)  Non-helper UMO  and (4) Human partner groups dogs had restricted interaction with the remote control car and the unfamiliar human partners. In the  Human  partner,  Helper UMO  and  Helper UMO Control  groups the partners were able to revert dogs’ choice for the small amount by indicating the small one, but the  Non-helper UMO  was not. We suggest that dogs are able to generalize their wide range of experiences with humans to another type of agent as well, based on the recognition of similarities in simple behavioural patterns.

An Investigation on Social Representations: Inanimate Agent Can Mislead Dogs (Canis familiaris) in a Food Choice Task