Seven roles of nonverbal communication

Repetition: People often repeat the information contained in the words they have used to 'say it again' using gestures or vocal sounds. A simple nod of the head can repeat the initial message of 'yes' but can also add frustration, trust, encouragement and many other nuances to the original language. 
Examples of Repetition: saying yes and then nodding or making the appropriate hand gesture, asking a question then raising eyebrows, saying I don't know and then shrugging the shoulders
Contradiction: It is important to remember that conflicting body language or voice tone do not  necessarily mean a person is not telling the truth. It can also be a result of feelings of uncertainty, ambivalence, or frustration. However, it is a good indication that there may well be a problem that will need to be resolved at some point
Examples of Contradiction: saying something positively or affirming something is true whilst shaking head, blushing, uneven voice, moving uncomfortably and shifting body position
Substitution: Facial expressions, head movements and hand gestures are often used instead of verbal language altogether. For example, a person's eyes can often convey a far more vivid message than words and often do.
Examples of Substitution: holding up your hands as a form of surrender or as an apology, looking skywards in frustration, narrowing the eyes to show suspicion
Complementing: We can complement our verbal communications by standing in a certain way, by using gestures or facial expressions. In order to complement the verbal message it must have the same kind of meaning.  Both complementing and accenting add to the verbal message.
Examples of Complementing: raising voice and pushing head forward when angry, lowering head and tone of voice when sad, speaking quickly when excited
 Accenting: Accenting a verbal message is very similar but tends to be used for specific parts of it, rather than the whole. Accenting can change the meaning to a certain degree.
Examples of Accenting: stamping your foot on the floor, pounding your fist on a table, pointing your finger, rolling your eyes up and to the side whilst lifting your head to show dissatisfaction 
 Moderating: Moderating does exactly the opposite to complimenting and accenting by reducing or diverting attention away from what is being said, and therefore, taking away from the meaning of the verbal communication.
Examples of Moderating: speaking very quietly, mumbling and mispronouncing words, not making eye contact, speaking too quickly, diverting attention by looking in a new direction 
Regulating: There are many nonverbal signals used during our interactions that help people understand the ebb and flow of conversation and when a person should speak or not speak.
Examples of Regulating: breaking eye contact, opening mouth or raising hand in preparation to speak, making a noise to 'clear your throat', nodding your head for somebody else to speak

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