Brain-Buzzing Thinking Cap Can Make You Smarter or Dumber

People have been working on the concept of an electronic cap to supercharge your brain's learning ability for a while. But the one you see here, devised by a Vanderbilt team, has a funny (and potentially very abusable) trick: flip a switch, and it makes you more prone to mistakes and confusion. Don't show your… » 3/25/14 6:00pm 3/25/14 6:00pm