“People often start multi-tasking because they believe it will help them get more done. Those gains never materialize; instead, efficiency is degraded. “

and the above has been constantly verified by actual tests.  Before these tests were done,  I often felt a sense of iadequacy that I didnt seem to experience that up-tick in productivity that the “multi-taskers” claimed.  Often they claim that “I’m just made that way”;  “it’s how I roll”.  Studies on precisely those people proved otherwiase.

via Why Clay Shirky Banned Laptops, Tablets and Phones from His Classroom | Mediashift | PBS.