Mental BO

This resembles a test taken for one of the air forces. I call int BO(ring). It is to check your ability to do nothing without loosing focus. The test was taken after lunch. We were woken up at 4 o'clock. You get to see the screen with a hood, so you are isolated. You also get hearing protection. And it goes on for 30 min. The app has a test variant, and an action part. If you have a hard time to fall asleep, I would recon it might help you. It is the most boring test I have ever taken.