London, Dec 12 (IANS) Playing a violent video game for just an hour over a three-day period is enough to increase aggressive behaviour, the Daily Mail reported.
However, playing a non-violent video game, such as a racing game, has no effect on aggression when played for 20 minutes a day for three consecutive days.
Although previous studies have revealed a single violent gaming session can increase short-term aggression, this is the first to show longer-term effects, Mail said Tuesday.
Lead author professor Brad Bushman, of Ohio State University, US, compares the effect to smoking: "It's important to know the long-term causal effects of violent video games, because so many young people regularly play these games."
"Playing video games could be compared to smoking cigarettes. A single cigarette won't cause lung cancer, but smoking over weeks or months or years greatly increases the risk," he said.