Aggression
Some scholars believe that behaviors like aggression may be partially learned by watching and imitating people's behavior, while other researchers have concluded that the media may have some small effects on aggression. There is also research questioning this view. For instance, a long-term outcome study of youth found no long-term relationship between playing violent video games and youth violence or bullying. One study suggested there is a smaller effect of violent video games on aggression than has been found with television violence on aggression. This effect is positively associated with type of game violence and negatively associated to time spent playing the games. The author concluded that insufficient evidence exists to link video game violence with aggression. However, another study suggested links to aggressive behavior.
Recruit training
Evidence from Australia, the UK and the US shows that recruit training systematically stimulates aggression, particularly in those enlisted for ground close combat roles. Bayonet practice is an example, as the strong language of this instruction from a British army corporal illustrates:"I wanna see it in your eyes that you wanna kill these fuckers. Imagine these dummies are the fucking Taliban and they’ve just killed some of your mates. You wanna fuckin’ kill them. Show me your war face! [recruits yell] You need some fucking more aggression, show me your war face."Another example is milling, an exercise used for infantry training in which pairs of recruits wearing boxing gloves punch each other in the head as aggressively as possible.