Doom Didn't Make Me Do It
--from Science, Dec. 4, 2009, p. 1327
Oceans of studies—laboratory, longitudinal, and brain-imaging—haven't settled the question of whether violent TV programs and video games cause people to be violent. Now Christopher Ferguson, a psychologist at Texas A&M International University in Laredo, has weighed in with a graph showing that as video game sales have soared, youth violence has declined. Ferguson contends that lab-based experiments on "aggression" bear little relationship to actual violence. Psychologist L. Rowell Huesmann of the University of Michigan, Ann Arbor, says the graph is a "red herring" and that early viewing of violence has repeatedly been shown to influence later behavior.

This is a little hard to read, but the blue bars are the number of video game sales and the red line represents youth violence (for the years between 1996-2007, I believe).

