Smartphones don't necessarily make their users any smarter. In fact, the technological distractions might even make users dumber.
Researchers at University of California, Irvine and Carnegie Mellon University have found that people taking cognitive tests with access to smartphones and other gadgets scored 20 percent lower than those without.
Students couldn't concentrate for more than two minutes before sending an email or checking social media, the studies found.
Read more about this at NBC News.
