Tuesday, July 15, 2003
Evolution of language
Nicholas Wade writes an excellent article in today's New York Times about the early evolution of language -- a subject that has endlessly fascinated me. According to him, part of the reason for the lack of research on the subject has been the influence of Noam Chomsky, perhaps the best-known linguist, who has tended to duck it. I could go on and on, but I think Wade does a better job than me :)
At first glance, language seems to have appeared from nowhere, since no other species speaks. But other animals do communicate. Vervet monkeys have specific alarm calls for their principal predators, like eagles, leopards, snakes and baboons. Researchers have played back recordings of these calls when no predators were around and found that the vervets would scan the sky in response to the eagle call, leap into trees at the leopard call and look for snakes in the ground cover at the snake call. Vervets can't be said to have words for these predators because the calls are used only as alarms; a vervet can't use its baboon call to ask if anyone noticed a baboon around yesterday. Still, their communication system shows that they can both utter and perceive specific sounds.
At first glance, language seems to have appeared from nowhere, since no other species speaks. But other animals do communicate. Vervet monkeys have specific alarm calls for their principal predators, like eagles, leopards, snakes and baboons. Researchers have played back recordings of these calls when no predators were around and found that the vervets would scan the sky in response to the eagle call, leap into trees at the leopard call and look for snakes in the ground cover at the snake call. Vervets can't be said to have words for these predators because the calls are used only as alarms; a vervet can't use its baboon call to ask if anyone noticed a baboon around yesterday. Still, their communication system shows that they can both utter and perceive specific sounds.
