I was watching the Discovery Channel the other day, and these kids were hooked up to a brain-wave sensor, and based on the kids' brainwaves, it would control a video game (a small spaceship would move up and down on the screen). At first nothing would happen, but after a while the kids were able to control their brainwaves, thus moving the ship up and down on the screen avoiding the video game obstacles.

Does anyone know what the heck this is and what it is used for? Or if it could be used to induce LDs?