http://www.pewinternet.org/2012/11/01/how-teens-do-research-in-the-digital-world/

Three-quarters of AP and NWP teachers say that the internet  and digital search tools have had a “mostly positive” impact on their students’ research habits, but 87% say these technologies are creating an “easily distracted generation with short attention spans” and 64% say today’s digital technologies “do more to distract students than to help them academically.”