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Researchers Claim Link Between Video Games and Violence

Study tests kids in both America and Japan, finds higher aggression

November 4, 2008

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Parents, teachers and social critics have long suspected there was a link between violent video games and real world violence. Researchers say they're right.

The research team, at Iowa State University's Center for the Study of Violence, has linked effects of violent video games to aggression over a three to six month period in children from Japan as well as the United States.

The research links an earlier ISU study of 364 American children ages nine to 12 with two similar studies of more than 1,200 children between the ages of 12 and18 from Japan. It found that exposure to violent video games was a causal risk factor for aggression and violence in those children.

"Basically what we found was that in all three samples, a lot of violent video game play early in a school year leads to higher levels of aggression during the school year, as measured later in the school year -- even after you control for how aggressive the kids were at the beginning of the year," said ISU Distinguished Professor of Psychology Craig Anderson, who was recently elected president-elect for the International Society for Research on Aggression (IRSA).

ISU Assistant Professor of Psychology Douglas Gentile, the center's associate director, and Akira Sakamoto -- an associate professor of psychology at Ochanomizu University and a leading violent video games researcher from Japan -- collaborated with Anderson and additional Japanese researchers on the study.

Researchers assessed the children's video game habits and their level of physical aggression against each other at two different times during the school year.

"The studies varied somewhat in the length of time between what we're calling time one and time two (times between the reports of video game use and physical behavior)," Anderson said. "The shortest duration was three months and the longest was six months. Each of the three samples showed significant increases in aggression by children who played a lot of violent video games," he said.

Anderson began collaborating with Japanese researchers on the study several years ago when he visited Japan to give an invited address at the International Simulation and Gaming Association convention. He says Japan's cultural differences with the U.S. made it attractive for the comparison studies.

"The culture is so different and their overall violence rate is so much lower than in the U.S.," Anderson said. "The argument has been made -- it's not a very good argument, but it's been made by the video game industry -- that all our research on violent video game effects must be wrong because Japanese kids play a lot of violent video games and Japan has a low violence rate.

"By gathering data from Japan, we can test that hypothesis directly and ask, 'Is it the case that Japanese kids are totally unaffected by playing violent video games?' And of course, they aren't," he said. "They're affected pretty much the same way American kids are."

"It is important to realize that violent video games do not create schools shooters," Gentile said. "They create opportunities to be vigilant for enemies, to practice aggressive ways of responding to conflict and to see aggression as acceptable. In practical terms, that means that when bumped in the hallway, children begin to see it as hostile and react more aggressively in response to it. Violent games are certainly not the only thing that can increase children's aggression, but these studies show that they are one part of the puzzle in both America and Japan."

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