In 1960, David Berlo postulated Berlo’s Sender-Message-Channel-Receiver (SMCR) model of communication from Shannon Weaver’s Model of Communication (1949). He described factors affecting the individual components in the communication making the communication more efficient.

The model also focuses on encoding and decoding which happens before the sender sends the message and before the receiver receives the message respectively.



Berlo’s Model has mainly, four components to describe the communication process. They are sender, message, channel and receiver. Each of component is affected by many factors.

Berlo's SMCR Model of Communication



Components of Berlo’s Model of Communication

S -SENDER SOURCE

The sender is the source of the message or the person who originates the message. The person or source sends the message to the receiver. The following are the factor related to the sender and is also the same in the case of the receiver.

Communication Skills

Communication skills of a person are a factor that affects the communication process. If the sender has good communication skills, the message will be communicated better than if the sender’s communication skills are not good. Similarly, if the receiver cannot grasp the message, then the communication will not be effective. Communication skills include the skills to speak, present, read, write, listening, etc.

Attitude
The attitude of the sender and the receiver creates the effect of the message. The person’s attitude towards self, the receiver and the environment change the meaning and effect of the message.

Knowledge
Familiarity with the subject of the message makes the communicated message have its effect more. Knowledge on the subject matter makes the communicator send the message effectively.

Social Systems

Values, beliefs, laws, rules, religion, and many other social factors affect the sender’s way of communicating the message. It creates a difference in the generation of the message. Place and situation also fall under social systems.

Culture
Cultural differences make messages different. A person from one culture might find something offensive which is very much accepted in another culture.

 M-MESSAGE

A message is a substance that is being sent by the sender to the receiver. It might be in the form of voice, audio, text, video or other media. The key factors affecting the message are
Content
Content is the thing that is in the message. The whole message from beginning to end is the content.
Elements
Elements are the non-verbal things that tag along with the content like gestures, signs, language, etc.
Treatment
Treatment is the way in which the message is conveyed to the receiver. Treatment also affects the feedback of the receiver.

Structure
The structure of the message or the way it has been structured or arranged affects the effectiveness of the message.

Code

The code is the form in which the message is sent. It might be in the form of language, text, video, etc.

C-CHANNEL

Channel is the medium used to send the message. In mass communication and other forms of communication, technical machines might be used as a channel like a telephone, internet, etc. But in general communication, the five senses of a human being are the channel for the communication flow and it affects the effectiveness of the channel.

Hearing – We receive the message through hearing.
Seeing – We perceive through seeing. We also get non-verbal messages by seeing.
Touching – Many of the non-verbal communication happens from touching like holding hands.
Smelling – We collect information from smelling.
Tasting – Taste also provides the information to be sent as a message.



R- RECEIVER

The receiver is the person who gets the message sent in the process. This model believes that the thinking pattern and all other factors mentioned above must be in sync with that of the sender for the communication to be effective. The message might not have the same effect as intended if the receiver and sender are not similar. The receiver must also have very good listening skills. Other factors are similar to that of the sender.
Communication skills
Attitudes
Knowledge
Social Systems
Culture

Criticisms of Berlo’s SMCR Model of Communication:

  • There is no concept of feedback, so the effect is not considered.
  • There is no concept of noise or any kind of barrier in the communication process.
  • It is a linear model of communication, there is no two-way communication.
  • Both of the people must be similar according to all the factors mentioned above.

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