Lasswell's model
Harold Lasswell, a political scientist, developed a much quoted formulation of the main elements of communication: "Who says what in which channel to whom with what effect." This summation of the communication process has been widely quoted since the 1940s. The point in LassweU's comment is that there must be an "effect" if communication takes place. If we have communicated, we've produced an effect. It's also interesting to note that LassweU's version of the communication process mentions four parts - who, what, channel, whom. Three of the four parallel parts have been mentioned by Aristotle - speaker (who), subject (what), the person addressed (whom). Only channel has been added (Fig.5).
Fig.5 Lasswell's model of the communication
Most modern-day theorists discuss the four parts of the communication process,
but use different terms to designate them.
The Shannon and Weaver’s model
Communication models are divided into linear and non-linear. Among the early linear models we must single out the one proposed by Claude Shannon, an engineer for the Bell Telephone Company, and Warren Weaver, of the Rockefeller Foundation. This model is treated as the most influential of all early communication models.
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