There the study we was reading up on that the average joe that double tasks spends 80% more on the two tasks assembled than should you have done the tasks separately.
Have you watched a gambler in front of a slot machine? http://www.daepyung.co.kr/Board/write.asp?kindofboard=0&b_index=31789&n_mode=1&Gotopage=1&column=&searchString