Here are some science articles on game theory and video game performance I've found over the past year or so.
What gamers have in common with top athletes
Size of Brain Region Affects Video Game Performance
Men's Reactions Peak at Age 39
Study: Playing Video Games Improves Eyesight
The Future of Video Game Input: Muscle Sensors
Video Gamers Can Control Dreams, Study Suggests
Reactions Faster than Actions, Study Finds
NeuroSky lets gamers use their brains
Sleep may help you become a 'Guitar Hero'
Reward-driven people win more, even when no reward at stake
Game theory shows evolution follows most successful member
Unreal hormones: males treat games as social competitions
Moralists have the last laugh