" ONE OF THE MOST COMMON defenses of phones is the idea that they’re making us better at multitasking and, in so doing, more efficient. Unfortunately, this isn’t true. There’s actually no such thing as multitasking (that is, simultaneously processing two or more attention-demanding tasks), because our brains can’t do two cognitively demanding things at once.* When we think we’re multitasking, we’re actually doing what researchers call “task-switching.” Like cars making sharp turns, our brains need to slow down and switch gears every time we stop thinking about one thing and engage with another—a process that has been estimated to take twenty-five minutes every time you do it. "

― Catherine Price , How to Break Up with Your Phone: The 30-Day Plan to Take Back Your Life