How Words Can and Cannot Be Learned by Observation

"If language experiences are not rich, then where is your interest to retain them?" says Janice H. Im of Zero to Three: the National Center for Infants, Toddlers and Families. A new study from University of Pennsylvania and Harvard University suggests that understanding basic words may come from a flash of initial insight more than repetition. The study's findings suggest that children build concrete vocabulary by interacting with a complex, rich learning environment, not just repeated exposure to words in isolation.