The researchers believe that while rooks had the ability to cooperate, they may have failed to understand the importance and value of the act.

BBC: Rooks team up to solve problems

The ability of these robot systems to naturally interact, learn from, and effectively cooperate with people has been evaluated in numerous human subjects experiments, both inside the lab and in real-world environments.

FORBES: Cynthia Breazeal TED Talk on Personal Robotics