http://www.nytimes.com/2010/06/07/technology/07brain.html?src=me&ref=homepage
While many people say multitasking makes
them more productive, research shows otherwise. Heavy multitaskers actually
have more trouble focusing and shutting out irrelevant information, scientists
say, and they experience more stress.
And scientists are discovering that
even after the multitasking ends, fractured thinking and lack of focus
persist. In other words, this is also your brain off computers.