According to research by Harris Interactive, 81% of American youth report playing a video game at least once a month, and 94% of boys play once a month.

Playing Time

• 13 hours/week = the average time spent by 8-12 year olds playing video games
  >> 16 hours/week among boys
  >> 10 hours/week among boys
• 14 hours/week = the average time per spent by 13-18 year olds playing video games
  >> 18 hours/week among boys
  >> 8 hours/week among girls

Who plays violent video games?

• 90% of 13- to 18-year-old boys
• 89% of 8- to 12-year-old boys
• 62% of 13- to 18-year-old girls
• 49% of 8- to 12-year-old girls

Side Effects
The study also linked excessive video game playing with:

• performing poorly in school
• getting into physical fights
• being physically heavier

[via Ypulse]