From Harvard Magazine:
Video games may have a reputation for being violent and overly stimulating, but in a new study led by Harvard psychiatry professors, one video game appears to help kids with severe anger problems gain control of their emotions. The pilot study at Children’s Hospital Boston tests an intervention that features a video game based on the 1980s arcade favorite Space Invaders. Players shoot down space aliens, but with an important modification: they wear a monitor on one pinkie that tracks heart rate as they play. If that indicator rises above resting levels—signaling that they’re overexcited—players lose the ability to shoot.