In brief
Researchers discover that human adults engage in unique forms of communication with babies, contrasting starkly with other primates, revealing insights into the evolution of language.
A recent study suggests that the way humans interact with their infants through specific speech patterns may have played an integral role in the evolution of language. Unlike other primates, such as apes, who rarely talk to their young, humans constantly engage their babies in conversation. Johanna Schick, a linguist at the University of Zurich and co-author of the study, notes that this characteristic has vastly evolved in Homo sapiens. While most mammals possess vocalizations for communication, none can form words or sentences as humans do. Researchers often examine apes to understand the origins of human language because they share a common ancestor with us. Some research indicates that various basic elements of language had already formed in the distant ancestors we share with today's primates, which existed millions of years ago. For instance, chimpanzees are capable of generating different vocal calls, combining them to express new concepts, a trait that lays the groundwork for constructing sentences.Similar to human infants, ape babies require time to learn how to communicate like adults, although significantly less is known about how they develop their vocal abilities compared to the extensive research on human children's linguistic growth. A notable distinction in human communication is referred to as "infant-directed speech," or baby talk. This type of vocalization often includes repetitive words, emphasized syllables, and a melodious tone, effectively capturing the attention of young listeners who may not yet grasp word meanings.Such findings suggest that the unique characteristics of baby talk may not only engage infants but also aid in teaching them fundamental aspects of language as they grow.
