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; ...

Passive-aggressive people often say these 11 unnerving things without even realizing how damaging they sound. If you've ever ...

When people with high levels of narcissism feel ignored or excluded by others, they are more likely to lash out using specific types of passive-aggressive behavior. A recent study published in the ...

Research scientists say kids who are persistently aggressive or defiant in their teens were likely showing signs of persistent aggressive behavior years earlier when they are toddlers. Sometimes as a ...

Passive aggression, like most troubling aspects of behavior, occurs on a continuum. We have identified five distinct and increasingly pathological levels of passive-aggressive behavior that tend to ...

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 ...

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 ...

Learn how comparing aggression in chimpanzees and bonobos challenges the long-held belief that chimpanzees are the more violent of our closest ape relatives.

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.