Eleven of the teenagers in the study took longer to fall asleep after gaming than after watching the movie, while two fell asleep faster. As you might expect, four of the participants actually fell asleep during the documentary. The median time to sleep was 7.5 minutes after gaming and three minutes after watching the movie.

However…

The study isn’t without critics, of course. Michael Gradisar of Flinders University in Adelaide, Australia, said the strictly-controlled laboratory setting may have actually diminished the impact of the game-playing. Gaming sessions were limited to 50 minutes, the maximum amount of continuous gaming recommended by PlayStation 3 maker Sony. “The teens only played the video game for 50 minutes, and they only played it on a single night,” he said. “Despite finding that they were mentally stimulated playing the video game, I believe the ‘dose’ of 50 minutes was too low to have any major ramifications on their sleep.”

Fifty minutes? Fifty minutes of ‘gaming’ is not gaming. It’s an intro. My two cents - I generally have trouble sleeping, gaming makes it worse.