At the University Twente there is a overview about communication-related theories. Extremely useful and a must read – if not must know – for every designer:
The theories presented here are related to communication. Students can use these theories as a rich source for a better understanding of the theoretical fieldwork of communication. Choosing a theory for an assignment or report is made easier, since you are able to ‘browse’ through the different theories. All theories which are selected are used in the courses of Communication Studies. Stay critical when you use a theory, because theories are subjectively measured. A lot of theories are mentioned below, make your own judgment about which theories are most helpful and think why they are helpful.