(London Telegraph) Watching violent movies really does make people more aggressive - but only if they have an abrasive personality to start with, a study shows.
Bloody scenes do not have the same effect on passive characters who react to what they see on a screen in an entirely different way.
The link between X-rated films and video games and the rise in violent crime has been debated for years so scientists scanned the brains of two very different groups of people to see what happened as they were shown violent images.
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In the first study of its kind they found each person's reaction depended on how aggressive they were to begin with.