David Berlo's communication Model
The simplest and most influential message-centered model of our time came from David Berlo.
The idea of “source” was flexible enough to include oral, written, electronic, or any other kind of “symbolic” generator-of-messages.“Message” was made the central element, stressing the transmission of ideas. The model recognized that receivers were important to communication, for they were the targets.the notions of “encoding” and “decoding” emphasized the problems we all have (psycho-linguistically) in translating our own thoughts into words or other symbols and in deciphering the words or symbols of others into terms we ourselves can understand.
Westley and MacLean Communication Model:
Westley and MacLean realized that communication does not begin when one person starts to talk, but rather when a person responds selectively to his immediate physical surroundings.
Each interactant responds to his sensory experience, by abstracting out certain objects of orientation, Some items are selected for further interpretation or coding and then are transmitted to another person, who may or may not be responding to the same objects of orientation.