Nonverbal Communication
Nonverbal Communication refers to the process by which we communicate via wordless cues. This includes things like how we dress, our facial expressions, posture, gestures, rate of speech, pitch and tone of voice.
For example, when you go to a job interview, the interviewer evaluates you based on your answers to the interview questions, but may also gather information about you based on how you are dressed (if you are dressed inappropriately, the interviewer may interpret it to mean that you are not taking the interview seriously enough), the strength of your handshake (a weak handshake may be interpreted as a lack of confidence), or how fast you speak (talking too fast may be interpreted as nervousness).