Communication is a complex process, and it is difficult to determine where or with whom a communication encounter starts and ends. Models of communication simplify the process by providing a visual representation of the various aspects of a communication encounter. Some models explain communication in more detail than others, but even the most complex model still doesn’t recreate what we experience in even a moment of a communication encounter. Models still serve a valuable purpose for students of communication because they allow us to see specific concepts and steps within the process of communication, define communication, and apply communication concepts. When you become aware of how communication functions, you can think more deliberately through your communication encounters, which can help you better prepare for future communication and learn from your previous communication.
The three models of communication we will discuss are the transmission, interaction, and transaction models. Although these models of communication differ, they contain some common elements. The first two models we will discuss, the transmission model and the interaction model, include the following parts: participants, messages, encoding, decoding, and channels. In communication models, the participants are the senders and/or receivers of messages in a communication encounter. The message is the verbal or nonverbal content being conveyed from sender to receiver. For example, when you say “Hello!” to your friend, you are sending a message of greeting that will be received by your friend.
The internal cognitive process that allows participants to send, receive, and understand messages is the encoding and decoding process. Encoding is the process of turning thoughts into communication. As we will learn later, the level of conscious thought that goes into encoding messages varies. Decoding is the process of turning communication into thoughts. For example, you may realize you’re hungry and encode the following message to send to your roommate: “I’m hungry. Do you want to get pizza tonight?” As your roommate receives the message, he decodes your communication and turns it back into thoughts in order to make meaning out of it. Of course, we don’t just communicate verbally—we have various options, or channels for communication. Encoded messages are sent through a channel, or a sensory route on which a message travels, to the receiver for decoding. While communication can be sent and received using any sensory route (sight, smell, touch, taste, or sound), most communication occurs through visual (sight) and/or auditory (sound) channels. If your roommate has headphones on and is engrossed in a video game, you may need to get his attention by waving your hands before you can ask him about dinner.
Transmission (Linear) Model of Communication
The transmission model of communication describes communication as a linear, one-way process in which a sender intentionally transmits a message to a receiver (Ellis & McClintock, 1990). This model focuses on the sender and message within a communication encounter. Although the receiver is included in the model, this role is viewed as more of a target or end point rather than part of an ongoing process. We are left to presume that the receiver either successfully receives and understands the message or does not. The scholars who designed this model extended on a linear model proposed by Aristotle centuries before that included a speaker, message, and hearer. They were also influenced by the advent and spread of new communication technologies of the time such as telegraphy and radio, and you can probably see these technical influences within the model (Shannon & Weaver, 1949). Think of how a radio message is sent from a person in the radio studio to you listening in your car. The sender is the radio announcer who encodes a verbal message that is transmitted by a radio tower through electromagnetic waves (the channel) and eventually reaches your (the receiver’s) ears via an antenna and speakers in order to be decoded. The radio announcer doesn’t really know if you receive his or her message or not, but if the equipment is working and the channel is free of static, then there is a good chance that the message was successfully received.
Since this model is sender and message focused, responsibility is put on the sender to help ensure the message is successfully conveyed. This model emphasizes clarity and effectiveness, but it also acknowledges that there are barriers to effective communication. Noise is anything that interferes with a message being sent between participants in a communication encounter. Even if a speaker sends a clear message, noise may interfere with a message being accurately received and decoded. The transmission model of communication accounts for environmental and semantic noise. Environmental noise is any physical noise present in a communication encounter. Other people talking in a crowded diner could interfere with your ability to transmit a message and have it successfully decoded. While environmental noise interferes with the transmission of the message, semantic noise refers to noise that occurs in the encoding and decoding process when participants do not understand a symbol. To use a technical example, FM antennae can’t decode AM radio signals and vice versa. Likewise, most French speakers can’t decode Swedish and vice versa. Semantic noise can also interfere in communication between people speaking the same language because many words have multiple or unfamiliar meanings.
Although the transmission model may seem simple or even underdeveloped to us today, the creation of this model allowed scholars to examine the communication process in new ways, which eventually led to more complex models and theories of communication that we will discuss more later. This model is not quite rich enough to capture dynamic face-to-face interactions, but there are instances in which communication is one-way and linear, especially computer-mediated communication (CMC).
Interaction Model of Communication
The interaction model of communication describes communication as a process in which participants alternate positions as sender and receiver and generate meaning by sending messages and receiving feedback within physical and psychological contexts (Schramm, 1997). Rather than illustrating communication as a linear, one-way process, the interaction model incorporates feedback, which makes communication a more interactive, two-way process.
Feedback includes messages sent in response to other messages. For example, your instructor may respond to a point you raise during class discussion or you may point to the sofa when your roommate asks you where the remote control is. The inclusion of a feedback loop also leads to a more complex understanding of the roles of participants in a communication encounter. Rather than having one sender, one message, and one receiver, this model has two sender-receivers who exchange messages. Each participant alternates roles as sender and receiver in order to keep a communication encounter going. Although this seems like a perceptible and deliberate process, we alternate between the roles of sender and receiver very quickly and often without conscious thought.
The interaction model is also less message focused and more interaction focused. While the transmission model focused on how a message was transmitted and whether or not it was received, the interaction model is more concerned with the communication process itself. In fact, this model acknowledges that there are so many messages being sent at one time that many of them may not even be received. Some messages are also unintentionally sent. Therefore, communication isn’t judged effective or ineffective in this model based on whether or not a single message was successfully transmitted and received.
Figure 1.2 The Interaction Model of Communication
The interaction model takes physical and psychological context into account. Physical context includes the environmental factors in a communication encounter. The size, layout, temperature, and lighting of a space influence our communication. Whether it’s the size of the room, the temperature, or other environmental factors, it’s important to consider the role that physical context plays in our communication.
Psychological context includes the mental and emotional factors in a communication encounter. Stress, anxiety, and emotions are just some examples of psychological influences that can affect our communication. Feedback and context help make the interaction model a more useful illustration of the communication process, but the transaction model views communication as a powerful tool that shapes our realities beyond individual communication encounters.
Transaction Model of Communication
As the study of communication progressed, models expanded to account for more of the communication process. Many scholars view communication as more than a process that is used to carry on conversations and convey meaning. We don’t send messages like computers, and we don’t neatly alternate between the roles of sender and receiver as an interaction unfolds. We also can’t consciously decide to stop communicating, because communication is more than sending and receiving messages. The transaction model differs from the transmission and interaction models in significant ways, including the conceptualization of communication, the role of sender and receiver, and the role of context (Barnlund, 1970).
To review, each model incorporates a different understanding of what communication is and what communication does. The transmission model views communication as a thing, like an information packet, that is sent from one place to another. From this view, communication is defined as sending and receiving messages. The interaction model views communication as an interaction in which a message is sent and then followed by a reaction (feedback), which is then followed by another reaction, and so on. From this view, communication is defined as producing conversations and interactions within physical and psychological contexts. The transaction model views communication as integrated into our social realities in such a way that it helps us not only understand them but also create and change them.
The transaction model of communication describes communication as a process in which communicators generate social realities within social, relational, and cultural contexts. In this model, we don’t just communicate to exchange messages; we communicate to create relationships, form intercultural alliances, shape our self-concepts, and engage with others in dialogue to create communities. In short, we don’t communicate about our realities; communication helps to construct our realities.
The roles of sender and receiver in the transaction model of communication differ significantly from the other models. Instead of labeling participants as senders and receivers, the people in a communication encounter are referred to as communicators. Unlike the interaction model, which suggests that participants alternate positions as sender and receiver, the transaction model suggests that we are simultaneously senders and receivers. For example, on a first date, as you send verbal messages about your interests and background, your date reacts nonverbally. You don’t wait until you are done sending your verbal message to start receiving and decoding the nonverbal messages of your date. Instead, you are simultaneously sending your verbal message and receiving your date’s nonverbal messages.
This is an important addition to the model because it allows us to understand how we are able to adapt our communication—for example, a verbal message—in the middle of sending it based on the communication we are simultaneously receiving from our communication partner.
Figure 1.3 The Transaction Model of Communication
The transaction model also includes a more complex understanding of context. The interaction model portrays context as physical and psychological influences that enhance or impede communication. While these contexts are important, they focus on message transmission and reception. Since the transaction model of communication views communication as a force that shapes our realities before and after specific interactions occur, it must account for contextual influences outside of a single interaction. To do this, the transaction model considers how social, relational, and cultural contexts frame and influence our communication encounters.
Social context refers to the stated rules or unstated norms that guide communication. As we are socialized into our various communities, we learn rules and implicitly pick up on norms for communicating. Some common rules that influence social contexts include don’t lie to people, don’t interrupt people, don’t pass people in line, greet people when they greet you, thank people when they pay you a compliment, and so on. Parents and teachers often explicitly convey these rules to their children or students. Rules may be stated over and over, and there may be punishment for not following them.
Norms are social conventions that we pick up on through observation, practice, and trial and error. We may not even know we are breaking a social norm until we notice people looking at us strangely or someone corrects or teases us. For example, as a new employee you may over- or underdress for the company’s holiday party because you don’t know the norm for formality. Although there probably isn’t a stated rule about how to dress at the holiday party, you will notice your error without someone having to point it out, and you will likely not deviate from the norm again in order to save yourself any potential embarrassment. Even though breaking social norms doesn’t result in the formal punishment that might be a consequence of breaking a social rule, the social awkwardness we feel when we violate social norms is usually enough to teach us that these norms are powerful even though they aren’t made explicit like rules. Norms even have the power to override social rules in some situations. To go back to the examples of common social rules mentioned before, we may break the rule about not lying if the lie is meant to save someone from feeling hurt. We often interrupt close friends when we’re having an exciting conversation, but we wouldn’t be as likely to interrupt a professor while they are lecturing. Since norms and rules vary among people and cultures, relational and cultural contexts are also included in the transaction model in order to help us understand the multiple contexts that influence our communication.
Relational context includes the previous interpersonal history and type of relationship we have with a person. We communicate differently with someone we just met versus someone we’ve known for a long time. Initial interactions with people tend to be more highly scripted and governed by established norms and rules, but when we have an established relational context, we may be able to bend or break social norms and rules more easily. For example, you would likely follow social norms of politeness and attentiveness and might spend the whole day cleaning the house for the first time you invite your new neighbors to visit. Once the neighbors are in your house, you may also make them the center of your attention during their visit. If you end up becoming friends with your neighbors and establishing a relational context, you might not think as much about having everything cleaned and prepared or even giving them your whole attention during later visits. Since communication norms and rules also vary based on the type of relationship people have, relationship type is also included in relational context. For example, there are certain communication rules and norms that apply to a supervisor-supervisee relationship that don’t apply to a brother-sister relationship and vice versa.
Just as social norms and relational history influence how we communicate, so does culture. Cultural context includes various aspects of identities such as race, gender, nationality, ethnicity, sexual orientation, class, and ability. Whether we are aware of it or not, we all have multiple cultural identities that influence our communication. Some people, especially those with identities that have been historically marginalized, are regularly aware of how their cultural identities influence their communication and influence how others communicate with them. Conversely, people with identities that are dominant or in the majority may rarely, if ever, think about the role their cultural identities play in their communication.
References
Barnlund, D. C., “A Transactional Model of Communication,” in Foundations of Communication Theory, eds. Kenneth K. Sereno and C. David Mortensen (New York, NY: Harper and Row, 1970), 83–92.
Ellis, R. and Ann McClintock, You Take My Meaning: Theory into Practice in Human Communication (London: Edward Arnold, 1990), 71.
Schramm, W., The Beginnings of CommunicationStudy in America (Thousand Oaks, CA: Sage, 1997).
Shannon, C. and Warren Weaver, The Mathematical Theory of Communication (Urbana, IL: University of Illinois Press, 1949), 16.
Thurlow, C., Laura Lengel, and Alice Tomic, Computer Mediated Communication: Social Interaction and the Internet (London: Sage, 2004), 14.