Ferguson says it's easy to think senseless video game violence can lead to senseless violence in the real world. But he says that's mixing up two separate things.
"Many of the games do have morally objectionable material and I think that is where a lot of the debate on this issue went off the rails," he said. "We kind of mistook our moral concerns about some of these video games, which are very valid — I find many of the games to be morally objectionable — and then assumed that what is morally objectionable is harmful."
In other words, if you define harm as getting in trouble with the police, violent video games probably aren't a risk. But if you're worried about lesser kinds of harm, they can be a risk.
"Playing violent video games probably will not turn your child into a psychopathic killer," Bushman said, "but I would want to know how the child treats his or her parents, how they treat their siblings, how much compassion they have."
So the dueling scientific studies aren't really at odds with each other — they just make different assumptions. Which may be why Bushman and Ferguson agree on one thing: as fathers, they've banned their own kids from playing violent video games.
It's A Duel: How Do Violent Video Games Affect Kids? : NPR