We all come across people who appear very calm but who we can sense have anger and hostility beneath the surface. The show of calmness is an effort to subtly and discretely hide their real feelings.

Aggression can be contagious, suggests new research. People who repeatedly observe aggressive behavior have a higher likelihood of engaging in violent behavior themselves, scientists say. Researchers ...

Babies bite. Toddlers throw tantrums. Kids play rough. Siblings might swat at each other while fighting over toys or the last popsicle. It's not uncommon for children — especially younger ones who ...

From whispering gossip at the water cooler to evading personal contact by way of email, today’s workplace offers countless opportunities for passive-aggressive behavior. Passive aggression is a ...