Humans often take for granted that when they speak, others (ideally) wait for them to finish before responding. Surprisingly, this conversational turn-taking鈥攖alking, listening, replying鈥攈as not been observed in other primates, including our closest relatives, chimpanzees, who instead use gestures as the basis fore their communication.
Until recently. Researchers at Princeton University report that the Marmoset monkey exhibits similar communication style to humans when it comes to conversing. They monkeys don鈥檛 seem to have an actual language, reports , but the timing of their calls suggests the foundations of human language.
When placed out of sight of one another, monkeys in one area would wait to respond until monkeys in another area finished calling, following 鈥渦nspoken rules of conversational etiquette.鈥
This finding, reported in the journal , suggests that human conversational turn-taking might have evolved via a similar route, although on a parallel branch of the evolutionary tree.
鈥淚f we don鈥檛 take turns, if we鈥檙e overlapping, it鈥檚 very difficult to understand each other,鈥 said Princeton鈥檚 Asif Ghazanfar, who co-authored the study. 鈥淭urn-taking is foundational.鈥