This document compiles and classifies research findings on the influences of media violence, particularly its effects on children's and young people's aggression or violent behavior; the review draws on many studies with different theories and methods. The research findings are presented in the following areas: (1) imitation; (2) aggression (including the influence of different kinds of violence); (3) fear; (4) conceptions of violence in reality; (5) habituation; (6) constructive actions; (7) excitement; (8) identity seeking/group belonging; and (9) working through problems, understanding, or knowledge. The review also touches on research that explores media violence through the lenses of other media content, culture at large, and political economy. Based on the review, it was concluded that, looking beyond direct and simple causal relations between media violence and aggression, everyone receives impressions from and is in some way negatively influenced by media violence, although in different ways based on varying motives, intentions, wishes, and life conditions. (Contains 16 notes, some of which reference studies in the review.) (EV)