Well, leave it to a blog to debunk the CNN article that stated that email is worse for your IQ than marijuana. Mind Hacks provides a very sane analysis of the study, and a common sense conclusion that of course distractions will lower your ability to score well on an IQ test, but removing distractions takes care of that problem.
Please note: I've moved my active blogging over to a new site, called Jason Clarke - Infinite Bass Line. I will leave this site up indefinitely, but if you're interested in my latest posts please consider visiting the new site.