In other words, in times of boredom our brain has enough space to get lost in digressions and daydreams, as Moshe Bar and other scientists have shown, they have a pivotal role in cognitive processes.

We know that navigate between different occupations simultaneously causes an increase in cortisol levels, and that although more and more people are dedicated to multitasking, only 2% on average is able to devote real attention to more than one task at a time.

From Wired