Quote:
But why, exactly, does multitasking have such a negative effect? According to Dave Crenshaw, business coach and author of The Myth of Multitasking, the damage is caused by what he calls the “switching cost” – the time taken to switch from one task and refocus on another. “You actually take much longer to accomplish things, make more mistakes and increase your stress,” he says….
http://www.guardian.co.uk/money/2009/oct/05/avoid-multitasking