A new study in psychology found that experiences in the home growing up, even warm parenting, can drive different types of narcissism in young adulthood.

The California Families Project is the most comprehensive long-term study of Latino families in the U.S. It has built an unparalleled dataset that researchers at UC Davis and other leading universities around the world use to study the complexity of challenges facing Mexican-origin families in California.

Adolescents who had emotional support from friends and relatives, and who were biologically prepared to respond well to others, were more likely to exhibit prosocial behavior and empathy for others as they entered young adulthood, compared to adolescents without that kind of backing.