Researchers at the Max Planck Institute for Evolutionary Anthropology in Leapzig, Germany have investigated how social models affect memory in great monkeys. He created a tower to young and adult apes with a video of a human hand (a social model) or a mechanical claws (a non-social model). The results showed that while adult apps recalled the towers manufactured by a human hand, which was better than those built by a claw, the little apes did not.
