Blood in Violent Video Games Affects Aggression, Hostility, and ArousalSeptember 13, 2008
This study is yet another evidence for already large body of knowledge in this area.
They had avid gamers (the experiment was repeated among non-gamers, with similar results) play Mortal Kombat on a Playstation 2 using one of four levels of bloodiness, from Maximum (where combatants not only bled profusely, but the blood pooled on the ground and could be realistically tracked around the combat arena when players stepped in it) to None (where even a brutal hit with a sword or other weapon would cause no bleeding).
Before and after the gaming session, players’ hostile thoughts and feelings were measured with a survey, and heart rate was taken at several points to measure arousal.
This study offers convincing evidence that violence itself, rather than other aspects of game-play, may be responsible for real-world aggressive behavior and hostile attitudes.
The bloodier the game, the more hostile the gamer (Cognitive Daily)
C Barlett, R Harris, C Bruey (2008). The effect of the amount of blood in a violent video game on aggression, hostility, and arousal Journal of Experimental Social Psychology, 44 (3), 539-546 DOI: 10.1016/j.jesp.2007.10.003