According to the Harvard Business School, a new report by researchers at the HBS demonstrates that the body posture inherent in operating everyday gadgets affects not only your back, but your behavior. According to the study, “iPosture: The Size of Electronic Consumer Devices Affects Our Behavior,” operating a relatively large device inspires more assertive behavior than working on a small one. So, if you use your iPhone before going into a meeting and you find yourself not saying much, it’s because using your iPhone has made you puny.