We’ve all been there. You sit down to play a few levels of whatever you’re plowing through at the moment and the next thing you know it feels like someone’s glued sandpaper to the inside of your eyelids and the clock taunts you with an obscenely late hour. A study presented at the recent SLEEP 2009 event told the world what millions of World of Warcraft subscribers already know: gamers get less sleep.

The study also showed that people who reported their gaming interfered with their sleep got 1.6 hours less shut-eye than everyone else and those who reported being addicted to gaming slept an hour less on weekdays. Only a third of those who reported being addicted felt that it interfered with their sleep.

While it’s easy to blame this on escapist, socially inept stereotypes, it’s quite easy to get caught up in games. Sandbox games can be particularly time-obliterating since there’s no obvious landmarks to call your attention to how long you’ve been playing. Bizarrely, the easiest I’ve ever been drawn into a game without concern for time was Viva Pinata. I haven’t played it since out of fear of losing entire days to its colorful world.