What are the difference of communication theories?

Question

What are the difference of communication theories?

Answer 1

"who says what to whom in what channel with what effect,"

mechanistic:  communication to be a perfect transaction of a message from the sender to the receiver.  

psychological:  communication as the act of sending a message to a receiver, and the feelings and thoughts of the receiver upon interpreting the message.

social constructionist: communication to be the product of the interactants sharing and creating meaning.

systemic: communication to be the new messages created via “through-put”, or what happens as the message is being interpreted and re-interpreted as it travels through people.