Yves Citton的“The Ecology of Attention”里关于multitasking这段in terms of sampling quality讲得好简洁清晰：

“What we attribute to an ability to carry out several operations at the same time (multi-tasking) – like driving a car and talking about philosophy with a passenger, while at the same time scratching your leg and noticing an ad for a new film – in reality implies knowing how to modulate the sampling level at which we take in and deal with the information drawn from each of the spheres considered (the surrounding cars, the implications of the counter-argument that has been raised, the location of the itch, the names of the actors). What our attention gains quantitatively by considering several objects simultaneously, it loses qualitatively in intensity with each taken separately.”

觉得这里还有一重是task(s)自身proceeding的速率和人processing的速率之间的耦合。前者低的时候不需要很高的sampling quality，如果此时后者高就可以multitasking。但如果其中有前者高后者低的task，注意力的分配就会发生竞争/挤压。一种处理方案是基于优先级直接drop掉部分task(e.g.视而不见/听而不闻)，另一种处理方案是所有task都受到sampling quality降低的影响。

而“无聊”或许一种可能是sampling quality提高也无法得到更多输入，但另一种可能是这个具体的人已经不习惯使用高sampling quality了。