Remember that kid in your grade school class who stuttered? Well, he was in good company–a whopping three million people in the United States alone are affected by this problem. It isn’t life threatening, but it certainly can be life hampering, as anyone who has a stutter can tell you. There’s something very interesting about stuttering, though, which you might not expect: it can be effected by what you hear. For a long time stutterers have understood that talking along in a group, such as when you recite the pledge of allegiance, can make the problem diminish.