For infants, distinguishing between friends and strangers is a laughing matter

Infants as young as five months can differentiate laughter between friends and that between strangers, finds a new study. The results suggest that the ability to detect the nature of social relationships is instilled early in human infancy, possibly the result of a detection system that uses vocal cues.

from Top Health News -- ScienceDaily https://ift.tt/2Hrnf3k