"Slow multitasking" is the good kind of multitasking

There's plenty of research that provides evidence to support the idea that multitasking is a fool's bargain: instead of getting two things done at once, you go slower on both, and do worse. But there's more than one kind of multitasking: texting while driving is a terrible idea, but what about juggling multiple projects at once?

Tim Harford (