These are the Inquisit 4.0 files for running the male one-on-one version of the competition-aggression task used by Oxford, J., Tiedtke, J. M., Ossmann, A., Özbe, D., & Schultheiss, O. C. (in press, Endocrine and aggressive responses to competition are moderated by contest outcome, gender, individual versus team competition, and implicit motives, PLoS One). Movie clips for the male winning and losing rounds are included with permission by the actor visible in the videos. These clips need to be replaced by videos made in the lab setting the contest-aggression task is run in.