From the 'you're kidding! dept.: Video-Game Ownership May Interfere With Young Boys’ Academic Functioning.
"The results of this study showed that the boys who received the video-game system immediately spent more time playing video games and less time engaged in after-school academic activities than boys who received the video-game system at the end of the experiment.
Furthermore, the boys who received the video-game system at the beginning of the study had significantly lower reading and writing scores four months later compared with the boys receiving the video-game system later on.
Although there were no differences in parent-reported behavioral problems between the two groups of kids, the boys who received the video-game system immediately had greater teacher-reported learning problems."