<P> In 2014, Villanova professor Patrick M. Markey conducted a study with 118 teenagers suggesting that video games have no influence on increased aggression of users; however, he did find that when used for the right amount of time (roughly 1 hour) video games came make children nicer and more socially interactive . This information was provided by the teens teachers at their local schools . </P> <P> A 2014 study by Andrew Przybylski at Oxford University examined the impact of violent content and frustration on hostility among video game players . In a series of experiments, Przybylski and colleagues demonstrated that frustration, but not violent content, increased player hostility . The authors also demonstrated that some previous "classic" violent video game experiments were difficult to replicate . </P> <P> One longitudinal study from 2014 suggested that violent video games were associated with very small increases in risk taking behavior over time . </P> <P> In 2015, the American Psychological Association released a review that found that violent video games caused aggressive behavior, with Mark Appelbaum, the chair of the task force that conducted the review, saying that "the link between violence in video games and increased aggression in players is one of the most studied and best established in the field ." However, Appelbaum also characterized the size of the correlation as "not very big". The same review found insufficient evidence of a link between such video games and crime or delinquency . Critics, including Peter Gray and Christopher Ferguson, expressed concerns about methodological limitations of the review . Ferguson stated that "I think (the task force members) were selected because their opinions were pretty clear going in ." At least four of the seven task force members had previously expressed opinions on the topic; critics argued this alone constitutes a conflict of interest, while a task force member defended that "If it were common practice to exclude all scientists after they render one conclusion, the field would be void of qualified experts". </P>

When was the first violent video game released