Gamers who play violent games online actually feel relaxed after they have played, according to new research discovered by Develop Magazine.

The mag found that a sampling of 292 World of Warcraft players, aged 12-83, were more likely to feel calm or tired after playing a round of the popular online game.

"There were actually higher levels of relaxation before and after playing the game as opposed to experiencing anger but this did very much depend on personality type," said Jane Barnett, who headed the study.

Barnett added the research will help develop an emotion and gaming questionnaire to help distinguish the type of gamer who is likely to transfer their online aggression into everyday life.