Rekindling the debate as to the existence of video game addiction is a recent study from researchers at Iowa State University and the National Institute on Media and the Family. The study, which is based on data from a nationwide survey of 1,178 American children and teenagers, aged 8 to 18, found that roughly one in 10 video game players (8.5 percent of American youth) show signs of addictive behavior. Some displayed at least six of 11 symptoms of pathological gambling as defined by the American Psychiatric Association. (Researchers adopted the gambling addiction criteria because there is no current medical diagnosis of video game addiction).