Nobody knows the real reason. But the way I like to think of it is: boredom is the gateway to mind wandering. If every time that your mind might wander, you look at your phone, you've interrupted the process. It's like a muscle. That makes sense because that's what the technology has been designed to do. It's been designed to exploit that split second where you decide, "Should I look at my phone? Yeah. You should check Facebook. You should retweet something." That, we're told, is how you build a personal brand. It's how you stay connected to friends and family.
