I don't even need to read this article. I know humans are terrible at multitasking.

True, true, but it's actually about more than just multi-tasking. There is something about hunching over and tapping on a small little screen that psychologically impairs us.

That poor posture, Harvard Business School researchers Maarten Bos and Amy Cuddy find, undermines our assertiveness.

Their latest experiment--which we'll get to in a moment--is a continuation of Cuddy's earlier research, which has done work to establish that your body posture shapes who you are. In short, the more open and expansive your posture is, the more assertive you'll be--owing to how posture relates to the levels of testosterone and cortisol in your system--while the more hunched, scrunched, and closed you are, the less you'll embody your will.

Wow. I always wondered if there was a way to smartphone that also keeps good posture.