Pretending to Understand What Babies Say Can Make Them Smarter

a new studypublished in the journal Infancy got more specific, finding that verbally engaging with babies—listening to their gurgles and coos and then responding, conversation-style—may speed up their language development more than simply talking at them or around them.

Researchers from the University of Iowa and Indiana University observed a small group of mothers and their infants in individual unstructured play sessions over the course of six months, beginning when the children were eight months old, and coded the mothers’ responses to their babies’ babbling into two categories. “Redirective” responses involved turning the babies’ attention elsewhere, like showing them a toy or pointing out something in the room, while “sensitive” responses were ones where the mothers verbally replied to or imitated their sounds—though, as the study notes:

Imitations rarely took the form of imitating the sound that the infant made, but more often involved the mother modeling the word that the sound approximated and expanding on it (e.g., if the infant uttered “da-da-da,” the mother would say “Da-da is working. I am ma-ma”).