Which Is Worse for Your Brain: Texting or Pot? (Hint: Pass the Pipe)by Richard Young
http://www.bnet.com/2403-13242_23-383397.html?promo=713&tag=nl.e713

A University of London study done for Hewlett-Packard found that “infomania” — a term connected with addiction to email and texting — can lower your IQ by twice as much as smoking marijuana.

Moreover, email can raise the levels of noradrenaline and dopamine in your brain by constantly introducing new stimuli into your day. When those levels get too high, complex thinking becomes more difficult, making it harder to make decisions and solve problems — key roles for all managers.