Multitasking Muddles Brains, Even When the Computer Is Off

As usual, the only relevant information is totally glossed over. What is this alleged evidence that such a seemingly insane test actually has meaning?

See also http://news.ycombinator.com/item?id=784465

well if the world is ever threatened by randomly hued geometric shapes that demand organisation and ordering in accordance with arbitrary rules, we'll know who to call.