Babies born in the United States are more social and impulsive than those from some other countries, outlines a recent publication authored by Dr. Masha Gartstein.

East–west, collectivist-individualist: A cross-cultural examination of temperament in toddlers from Chile, Poland, South Korea, and the U.S.“, published in the European Journal of Developmental Psychology, Oct 2016 – shows US kids are also, according to their moms, more likely to enjoy highly stimulating activities, less likely to be unhappy or angry and are easier to comfort when they do get upset.