Add Yahoo as a preferred source to see more of our stories on Google. How can parents distinguish typical aggressive behavior in kids from something more extreme? Experts explain. (Image: Getty; ...

HealthDay News — Higher levels of aggression in early adolescence predict more advanced biological aging by age 30 years, according to a study published online March 5 in Health Psychology.

Forbes contributors publish independent expert analyses and insights. Patricia writes about family law and tips for female lawyers. Aggression is defined as a form of physical or verbal behavior ...

In The Angry Smile: The Psychology of Passive Aggressive Behavior in Families, Schools and Workplaces, 2nd ed., we propose that the passive-aggressive student seems to derive genuine pleasure out of ...

While some people are honest about how they feel, there are 11 seemingly polite phrases passive-aggressive people use when they really don't like someone.

Call it hostile cooperation, sugarcoated hostility, or compliant defiance. Call it all of the above. Passive aggression does not alternate between passive behavior and aggressive behavior, but rather ...

Adolescent aggression leads to accelerated biological aging and health risks by age 30, driven by ongoing relationship conflict.

Chimpanzees have a reputation for being aggressive, while bonobos are often seen as their peaceful counterparts. This ...

A new study of chimpanzee and bonobo groups at zoos reveals similar levels of aggression. However, scientists found stark sex-based differences between the species.