Hal Pashler, psychology professor at UC San Diego, points out that not all attempts at multitasking are equally draining. If you’re doing something on autopilot, such as the laundry, then it makes perfect sense to read a book at the same time. But attempting to do two challenging tasks at once will lead to a drain in productivity. “You can’t do two demanding, even simple tasks, in parallel,” he adds.

Neuroscientists say multitasking literally drains the energy reserves of your brain – Quartz