I've read a few times now, in various articles, that "Only a small percentage of communication involves actual words: 7%, to be exact. In fact, 55% of communication is visual (body language, eye contact) and 38% is vocal (pitch, speed, volume, tone of voice). The world's best business communicators have strong body language: a commanding presence that reflects confidence, competence, and charisma." However!...when I contact the authors about the sources for this I never get a reply. In addition I did contact the authors of a book who propose the opposite...they claim it's an urban legend. Can anyone point me to the hard studies that show real evidence for this...or whatever the proper percentage is?