Dialing Up Your Brainpower
Want to feel calmer or increase your focus? No need to reach for Xanax or Adderall. With a few hundred dollars, you can buy devices that hook up to your smartphone and send low levels of electrical stimulation to your brain. One company, Thync, claims that its gadget can energize or calm your mood; other companies say their devices can improve attention, working memory, and sociability.