Summary
Highlights
The Shannon Weaver Model, developed by Claude Shannon and Warren Weaver in 1948, is a mathematical theory of communication. Originally designed to improve telephone communication, it proposes a linear model from sender to receiver. While largely attributed to Shannon, Weaver played a minimal role. Shannon's work focused on understanding communication and improving telephone quality.
The model begins with the sender or information source, who has the information and chooses a message, recipient, and channel. Messages can be sent orally, in writing, or through body language. The next step is the encoder, which converts the message into signals. This could be a machine converting words into binary digits for phones or computers, or a person forming ideas into spoken or written words.
The channel is the infrastructure that carries information from the sender to the receiver, also known as the medium. Examples include the internet for emails, cables for landline phones, or sound waves for face-to-face conversations. Noise interrupts the message during transmission and can be internal (errors in encoding/decoding, e.g., misspellings, misinterpretations) or external (external factors, e.g., static, traffic noise, poor internet connection). A key goal is to minimize noise to improve message quality.
Decoding is the opposite of encoding. In technology-driven communication (like telephones), a device decodes signals back into an understandable format. In direct human communication, decoding involves interpreting spoken words, written text, or images. The receiver is the final endpoint, where the message is received and understood, accounting for any noise.
Feedback, added by Norbert Wiener later, addresses the linear nature of the original model. Examples illustrate the model: a telephone conversation involves a sender, telephone encoder, phone lines as a channel, noise (mumbling, line interruptions), a telephone decoder, and a receiver who can provide feedback. Similar breakdowns are provided for listening to the radio and face-to-face discussions.
The model effectively explains barriers to communication by detailing the concept of noise and identifying areas for improvement. It identifies three levels where communication can be interrupted: technical problems (decoder/encoder/channel faults), semantic problems (message sent differs from message received), and effectiveness problems (message's ability to cause a response). It breaks communication into tangible parts for analysis and is transferable to multiple communication situations, beyond its original technological context.
The model is linear and initially lacked sufficient regard for feedback, which was added as an afterthought. It doesn't account for power relationships or how different identities influence message interpretation. Additionally, it fails to address one-to-many communication scenarios, for which other models like Lasswell's are more suitable.
The Shannon Weaver Model, also known as the information theory, is considered the 'mother of all models' for human communication. It's a mathematical, linear communication model that effectively explains the entire communication process from information source to receiver. Despite its limitations, it remains a highly influential framework for understanding communication.