From the report: The link between violent video game exposure and aggressive behavior is one of the most studied and best established. Of the 31 studi

From the report: The link between violent video game exposure and aggressive behavior is one of the most studied and best established. Of the 31 studies reviewed, 14 investigated the relation between violent video game use and aggressive behaviors. Aggressive behavior measures included experimental proxy paradigms, such as the administration of hot sauce or a noise blast to a confederate, self-report questionnaires, peer nomination and teacher rating of aggressiveness. If this is indeed the case, then there is cause for concern with these techniques, especially depending on the age group. [1] We further see self-reports mentioned as evidence for later factors, so as a whole I'm not sure what to think of this. Moreover, the actually interesting question (does this aggressive behavior lead to real-world violence) is openly admitted to be unanswered. I'd wager that to a large extent basic measurements of "aggression" will be positive simply due to the player being engrossed by the game in question. The methods listed above in general are hardly that rigorous. Furthermore: The research has also not adequately included samples representative of the current population demographics, nor has it sufficiently examined the potential differences in effects when participant samples have been diverse; no conclusions about differences in effects related to ethnicity, socioeconomic status, or culture can be drawn from the currently available research. [1] http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2812902/ http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2812902/