Ars Technica's science blog, Nobel Intent, has a post up on a study done by the Journal of Adolescent Health. The report attempted to gauge usage levels of violent videogames among young people in the US. The results are unsurprising to anyone who's ever worked in a second-hand game store: "Most boys, and many girls, played games that the ESRB had rated M, signifying that they were for mature audiences only. Of the games played by the boys, Grand Theft Auto and Halo were both in the top three, and GTA was also the 2nd most played game by girls, according to the data. Over half of all boys agreed with the statement 'I play electronic games because I like guns and weapons.' On the other hand, over 60 percent of boys and girls agreed with the statement 'I play electronic games because there's nothing else to do.'"