In general terms “interpersonal communication” is an over-defined notion as far as everything that is interpersonal could be regarded as communication. This interpretation may be related to one of the basic principles of interpersonal communication that is elaborated in the following statement :
“Human communication has two immutable laws:
You are communicating all the time, in your words, tone of voice, actions, dress, your presence and even your absence.
You cannot not communicate.
Interpersonal communication is not just a process of sending and receiving messages, but also a process of negotiating meanings, and the meaning you intend is not necessarily the one the audience takes away with them. Furthermore, communication is always complicated by an almost infinite number of factors such as expectations, attitude, prejudice, history, values and beliefs, moods, likes and dislikes, etc”
Despite of the fact that there are many models of the interpersonal communication, there are some substantial underlying principles in all of them: