Brian Hare's research on dogs shows that they have a genetic ability for joint attention with humans,something relatively rare between species.Based on what symbolic communication from humans do dogs perform "joint attention"?

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Dogs perform joint attention with humans through pointing, which is a form of symbolic communication. They are able to follow the direction of a pointed finger and understand that it is directing their attention to a certain object or location. This ability is believed to be due to a genetic predisposition and is relatively rare between species.

Brian Hare's Research on Dogs Shows That They Have a Genetic