In general, much research has suggested that males use more physical aggression than females.

In countries such as Kenya it has been found that young boys and girls have very similar rates of physical aggression.

Boys were 60 percent more likely to use physical aggression, often effectively.

Their bullying may take the form of physical aggression, threats or initiation.

Many of the movies and television programs children watch present physical aggression as a preferred first response to conflicts.

"I don't need this type of physical aggression on me."

Research has found that hypermasculinity is associated with sexual and physical aggression against women.

"I think he has to play right on that fine line of physical aggression without going over it."

If we stopped thinking physical aggression was the obvious way to settle things.

A government inquiry in 1989 found that 2 percent of teachers had reported facing physical aggression.