7–38–55 Communication Rule

According to Prof. Albert Mehrabian that there are three core elements in the effective face-to-face communication of emotions or attitudes: nonverbal behavior (facial expressions, for example), tone of voice, and the literal meaning of the spoken word.

Prof. Mehrabian quantified this tendency: words, tone of voice, and body language respectively account for 7%, 38%, and 55% of personal communication.