Linear vs. Interactive Model of Communication

Linear model of interpersonal communication is defined as a one way process in which communication is only coming from one person.  However, the interactive model of communication is a two way process in which communication is coming from 2 parties.  In this model the listener responds to the sender and gives their feedback.  In the interactive model the sender and the receiver are constantly interpreting each others message.  The more they understand of each others field of experience the more they can understand each other. 

I can understand how the linear model could have been hypothesized.  People thought communication was coming solely from verbal output however communication can also come from non-verbal gestures.  If someone is yawning, not talking, looking at their surrounding when someone is talking to them the speaker would assume they were bored and not listening to what they were saying.  So the linear model is flawed because it simply sees communication as only verbal output and doesn’t take into account other factors.