Greitemeyer, T., Traut-Mattausch, E., & Osswald, S. (2012). How to ameliorate negative effects of violent video games on cooperation: Play it cooperatively in a team. Computers In Human Behavior, 28(4), 1465-1470. doi:10.1016/j.chb.2012.03.009

The present research tests the idea that playing a team-player video game in which players work together as teammates and assist each other in achieving a common goal ameliorates the negative effects of violent video game play on cooperative behavior. In fact, two studies revealed that, relative to a single-player mode, playing a cooperative team-player violent video game increased cooperation in a decision dilemma task. Importantly, cooperative behavior generalized across targets in that the decision dilemma was played with a partner who was not the video game play partner. Mediation analyses revealed that cooperative team-play promoted feelings of cohesion, which activated trust norms, which in turn increased cooperative behavior. (PsycINFO Database Record (c) 2012 APA, all rights reserved)