Human men are typically more aggressive than human women, a finding supported by reams of research. But surveys of 4,136 individuals in 24 countries reveal an exception to the trend: aggression in ...

I recently wrote about a surprising finding among American participants: Contrary to all the data on violent crime, playground aggression, and other measures of aggressive behavior, sisters are every ...

Did your sister ever hit you, kick you, or yell at you? Did you ever hit, kick, or yell at her? What about your brother? According to a study published in Evolution and Human Behavior, sibling ...

Sibling rivalry is normal, but common parenting habits like comparing kids, forcing sharing, or taking sides can make it ...