Schramm's Model
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Schramm's model of communication is an early and influential
model of communication Models of communication are simplified representations of the process of communication. Most models try to describe both verbal and non-verbal communication and often understand it as an exchange of messages. Their function is to give a compact ...
. It was first published by
Wilbur Schramm Wilbur Lang Schramm (August 5, 1907 – December 27, 1987) was a scholar and "authority on mass communications". He founded the Iowa Writers' Workshop in 1935 and served as its first director until 1941. Schramm was hugely influential in establish ...
in 1954 and includes important innovations over previous models, such as the inclusion of a
feedback Feedback occurs when outputs of a system are routed back as inputs as part of a chain of cause-and-effect that forms a circuit or loop. The system can then be said to ''feed back'' into itself. The notion of cause-and-effect has to be handled ...
loop and the discussion of the role of fields of
experience Experience refers to conscious events in general, more specifically to perceptions, or to the practical knowledge and familiarity that is produced by these conscious processes. Understood as a conscious event in the widest sense, experience involv ...
. For Schramm,
communication Communication (from la, communicare, meaning "to share" or "to be in relation with") is usually defined as the transmission of information. The term may also refer to the message communicated through such transmissions or the field of inquir ...
is about sharing information or having a common attitude towards
sign A sign is an object, quality, event, or entity whose presence or occurrence indicates the probable presence or occurrence of something else. A natural sign bears a causal relation to its object—for instance, thunder is a sign of storm, or me ...
s. His model is based on three fundamental components: a
source Source may refer to: Research * Historical document * Historical source * Source (intelligence) or sub source, typically a confidential provider of non open-source intelligence * Source (journalism), a person, publication, publishing institute o ...
, a destination, and a
message A message is a discrete unit of communication intended by the source for consumption by some recipient or group of recipients. A message may be delivered by various means, including courier, telegraphy, carrier pigeon and electronic bus. A ...
. The process starts with an idea in the
mind The mind is the set of faculties responsible for all mental phenomena. Often the term is also identified with the phenomena themselves. These faculties include thought, imagination, memory, will, and sensation. They are responsible for various m ...
of the source. This idea is then
encoded In communications and information processing, code is a system of rules to convert information—such as a letter, word, sound, image, or gesture—into another form, sometimes shortened or secret, for communication through a communication ...
into a message using signs and sent to the destination. The destination needs to decode and
interpret Interpreting is a translational activity in which one produces a first and final target-language output on the basis of a one-time exposure to an expression in a source language. The most common two modes of interpreting are simultaneous interp ...
the signs in order to reconstruct the original idea. In response, they formulate their own message, encode it, and send it back as a form of feedback. Feedback is an important part of many forms of communication and can be used to mitigate processes that may undermine successful communication, such as external
noise Noise is unwanted sound considered unpleasant, loud or disruptive to hearing. From a physics standpoint, there is no distinction between noise and desired sound, as both are vibrations through a medium, such as air or water. The difference arise ...
or errors in the phases of encoding and decoding. The success of communication also depends on the fields of experience of the participants. A field of experience includes past life experiences as well as attitudes and
belief A belief is an attitude that something is the case, or that some proposition is true. In epistemology, philosophers use the term "belief" to refer to attitudes about the world which can be either true or false. To believe something is to take i ...
s. It affects how the processes of encoding, decoding, and interpretation take place. For successful communication, the message has to be located in the overlap of the fields of experience of both participants. If the message is outside the receiver's field of experience, they are unable to connect it to the original idea. This is often the case when there are big
cultural difference Cultural diversity is the quality of diverse or different cultures, as opposed to monoculture, the global monoculture, or a homogenization of cultures, akin to cultural evolution. The term "cultural diversity" can also refer to having different cu ...
s. Schramm holds that the sender usually has some goal they wish to achieve through communication. He discusses the conditions that are required to have this effect on the
audience An audience is a group of people who participate in a show or encounter a work of art, literature (in which they are called "readers"), theatre, music (in which they are called "listeners"), video games (in which they are called "players"), or ...
, such as gaining their attention and motivating them to act towards this goal. He also applies his model to
mass communication Mass communication is the process of imparting and exchanging information through mass media to large segments of the population. It is usually understood for relating to various forms of media, as its technologies are used for the dissemination o ...
. One important difference from other forms of communication is that successful mass communication is more difficult since there is very little feedback. In the 1970s, Schramm proposed various revisions to his earlier model. They focus on additional factors that make communication more complex, such as the relationship between sender and receiver, which influences the goal of communication and the roles played by the participants. Schramm's criticism of linear models of communication, which lack a feedback loop, has been very influential. One shortcoming of Schramm's model is that it assumes that the communicators take turns in exchanging information instead of sending messages simultaneously. Another objection is that Schramm conceives information and its meaning as preexisting entities rather than understanding communication as a process that creates meaning.


Background

Schramm's model of communication is one of the earliest interaction models of communication and was first published by
Wilbur Schramm Wilbur Lang Schramm (August 5, 1907 – December 27, 1987) was a scholar and "authority on mass communications". He founded the Iowa Writers' Workshop in 1935 and served as its first director until 1941. Schramm was hugely influential in establish ...
in 1954. It was conceived as a response to and an improvement over earlier attempts in the form of linear transmission models, like the
Shannon–Weaver model The Shannon–Weaver model is one of the first and most influential models of communication. It was initially published in the 1948 paper A Mathematical Theory of Communication and explains communication in terms of five basic components: a sour ...
and
Lasswell's model Lasswell's model of communication is one of the first and most influential models of communication. It was initially published by Harold Lasswell in 1948 and analyzes communication in terms of five basic questions: "Who?", "Says What?", "In What C ...
.
Models of communication Models of communication are simplified representations of the process of communication. Most models try to describe both verbal and non-verbal communication and often understand it as an exchange of messages. Their function is to give a compact ...
are simplified presentations of the process of
communication Communication (from la, communicare, meaning "to share" or "to be in relation with") is usually defined as the transmission of information. The term may also refer to the message communicated through such transmissions or the field of inquir ...
and try to explain it by discussing its main components and their relations. For Schramm, a central aspect of communication is that the participants "are trying to establish a 'commonness'" by sharing an
idea In common usage and in philosophy, ideas are the results of thought. Also in philosophy, ideas can also be mental representational images of some object. Many philosophers have considered ideas to be a fundamental ontological category of being ...
or
information Information is an abstract concept that refers to that which has the power to inform. At the most fundamental level information pertains to the interpretation of that which may be sensed. Any natural process that is not completely random ...
. In this regard, communication can be defined as "the sharing of an orientation toward a set of informational signs" and is based on a relationship between the communicators. So when a person calls the fire department to report a fire in their home, this is an attempt to share information about the fire. This sharing happens through messages. For Schramm, messages are made up of
sign A sign is an object, quality, event, or entity whose presence or occurrence indicates the probable presence or occurrence of something else. A natural sign bears a causal relation to its object—for instance, thunder is a sign of storm, or me ...
s. Each sign corresponds to some element in experience, like the sign "dog" which "stands for our generalized experience of dogs". This sign is meaningless for someone who has never experienced dogs before or who does not associate the sign with their experiences of dogs. The theories of psychologist
Charles Osgood Charles Osgood Wood III (born January 8, 1933), known professionally as Charles Osgood, is an American radio and television commentator, writer and musician. Osgood is best known for being the host of ''CBS News Sunday Morning'', a role he held ...
were an important influence and inspired Schramm to formulate his model. According to Osgood, meaning is located not just in the message but also in the social context. His
psycholinguistic Psycholinguistics or psychology of language is the study of the interrelation between linguistic factors and psychological aspects. The discipline is mainly concerned with the mechanisms by which language is processed and represented in the mind ...
approach focuses on how external
stimuli A stimulus is something that causes a physiological response. It may refer to: * Stimulation ** Stimulus (physiology), something external that influences an activity ** Stimulus (psychology), a concept in behaviorism and perception * Stimulus (eco ...
elicit internal responses in the form of interpretations. These responses mediate between the stimulus and its meaning. Osgood's ideas influenced Schramm in two important ways: (1) he posited a field of shared experience acting as the background of communication and (2) he added the stages of encoding and decoding as internal responses to the process. Because of these influences, some theorists refer to Schramm's model as the "Osgood–Schramm model". Most theorists identify Schramm's model with his 1954 book ''The process and effects of mass communication'' and present it as a reaction to earlier models developed in the late 1940s. However, Jim Blythe argues that Schramm's model is of earlier origin and was already present in Schramm's 1949 book ''Mass Communication''.


Overview and basic components

For Schramm, communication has in its most basic form three components: a
source Source may refer to: Research * Historical document * Historical source * Source (intelligence) or sub source, typically a confidential provider of non open-source intelligence * Source (journalism), a person, publication, publishing institute o ...
, a
message A message is a discrete unit of communication intended by the source for consumption by some recipient or group of recipients. A message may be delivered by various means, including courier, telegraphy, carrier pigeon and electronic bus. A ...
, and a destination. The source can be an individual person or an organization, like a newspaper or a television station. The same is true for the destination. The process starts in the sender's
mind The mind is the set of faculties responsible for all mental phenomena. Often the term is also identified with the phenomena themselves. These faculties include thought, imagination, memory, will, and sensation. They are responsible for various m ...
, where the message originates in the form of an idea. In order to share this information, the source needs to
encode The Encyclopedia of DNA Elements (ENCODE) is a public research project which aims to identify functional elements in the human genome. ENCODE also supports further biomedical research by "generating community resources of genomics data, software ...
it first into symbolic form since the idea cannot be transmitted directly from mind to mind. This can happen in various ways: the signs can be
linguistic Linguistics is the scientific study of human language. It is called a scientific study because it entails a comprehensive, systematic, objective, and precise analysis of all aspects of language, particularly its nature and structure. Linguis ...
(like written or spoken words) or non-linguistic (like pictures, music, or animal sounds). They are then transmitted through a
channel Channel, channels, channeling, etc., may refer to: Geography * Channel (geography), in physical geography, a landform consisting of the outline (banks) of the path of a narrow body of water. Australia * Channel Country, region of outback Austral ...
, for example, as sounds for a face-to-face conversation, as ink on paper for a letter, or as electronic signals in the case of
text messaging Text messaging, or texting, is the act of composing and sending electronic messages, typically consisting of alphabetic and numeric characters, between two or more users of mobile devices, desktops/laptops, or another type of compatible compute ...
. At this stage,
noise Noise is unwanted sound considered unpleasant, loud or disruptive to hearing. From a physics standpoint, there is no distinction between noise and desired sound, as both are vibrations through a medium, such as air or water. The difference arise ...
may interfere with the transmission and distort the message. Once the message reaches the receiver, the reverse process of decoding is applied: the receiver attaches meaning to the signs according to their own field of experience. This way, they try to reconstruct the sender's original idea. The process continues when the receiver returns a new message as feedback to the original sender. The process of communication can fail in various ways. For example, the message may be distorted by external noise. But errors can also occur at the stages of encoding and decoding when the source does not use the correct signs or when the pattern of decoding does not match the pattern of encoding. A further problem is posed if the original information is faulty, to begin with. For effective communication, all these negative influences need to be avoided. Schramm's model is based on the
Shannon–Weaver model The Shannon–Weaver model is one of the first and most influential models of communication. It was initially published in the 1948 paper A Mathematical Theory of Communication and explains communication in terms of five basic components: a sour ...
. The steps of encoding and decoding perform the same role as transmitter and receiver in the Shannon–Weaver model. Because of its emphasis on communication as a circular process, the main focus of Schramm's model is on the behavior of senders and receivers. For this reason, it does not involve a detailed technical discussion of the channel and influences of noise, unlike the Shannon–Weaver model.


Feedback

The role of
feedback Feedback occurs when outputs of a system are routed back as inputs as part of a chain of cause-and-effect that forms a circuit or loop. The system can then be said to ''feed back'' into itself. The notion of cause-and-effect has to be handled ...
is an important innovation of Schramm's model in comparison to earlier models. Schramm sees communication as a dynamic interaction in which two participants exchange messages. That means that the process of communication does not end in the receiver's mind. Instead, upon receiving a message, the communicator returns some feedback: they formulate a new message in the form of an idea, encode it, and convey it to the original sender, where the process starts anew. Communication is an endless process in the sense that people constantly decode and interpret their environment to assign meaning to it and encode possible responses to it. Models without a feedback loop, like the Shannon–Weaver model and
Lasswell's model Lasswell's model of communication is one of the first and most influential models of communication. It was initially published by Harold Lasswell in 1948 and analyzes communication in terms of five basic questions: "Who?", "Says What?", "In What C ...
, are called linear transmission models. They contrast with interaction models, also known as non-linear or circular transmission models. Schramm rejects the idea of a passive audience present in linear models of communication and argues instead that the audience should be understood as a full partner. Feedback is a vital aspect of many forms of communication. It can be used to confirm that the message was received and to mitigate the influence of noise. For example, the message may get distorted on the way or the receiver may misinterpret it. In such cases, the feedback loop makes it possible to assess whether such errors occurred and, if so, repeat the message to ensure that it is understood correctly. Schramm also discusses another form of feedback that does not depend on the other person. This happens when the sender pays attention to their own message, for example, when reading through a letter one just wrote to check its style and tone.


Field of experience

Another innovation of Schramm's model is the role of fields of
experience Experience refers to conscious events in general, more specifically to perceptions, or to the practical knowledge and familiarity that is produced by these conscious processes. Understood as a conscious event in the widest sense, experience involv ...
. A field of experience is a
psychological Psychology is the scientific study of mind and behavior. Psychology includes the study of conscious and unconscious phenomena, including feelings and thoughts. It is an academic discipline of immense scope, crossing the boundaries between t ...
frame of reference. It includes past life experiences as well as the attitudes, values, and
belief A belief is an attitude that something is the case, or that some proposition is true. In epistemology, philosophers use the term "belief" to refer to attitudes about the world which can be either true or false. To believe something is to take i ...
s of the communicators. Each participant has their own field of experience. It determines how the processes of encoding, decoding, and interpretation take place. For example, an American businessman is unable to encode their message in Russian if he has never learned this language or an African tribesman who has never heard of an airplane would be unable to accurately decode a message involving airplanes. The more the participants are alike, the more their fields of experience overlap. For communication to be successful, the message has to be located within both fields of experience, i.e. in their overlap. The bigger the
cultural difference Cultural diversity is the quality of diverse or different cultures, as opposed to monoculture, the global monoculture, or a homogenization of cultures, akin to cultural evolution. The term "cultural diversity" can also refer to having different cu ...
s, the more difficult effective communication becomes. This is especially relevant for communication across national boundaries. Blythe cites this lack of overlap as an example of failed communication in the case of foreign
advertisement Advertising is the practice and techniques employed to bring attention to a product or service. Advertising aims to put a product or service in the spotlight in hopes of drawing it attention from consumers. It is typically used to promote a ...
s, which may appear incomprehensible or unintentionally humorous. The lack of overlap can also happen for people within the same culture, for example, when an amateur tries to read specialist scientific literature. In some cases, such problems can be avoided if the sender is able to encode their message using an easy expression that is accessible to the destination. The concept of a ''field of experience'' is similar to what various later models refer to as social and cultural contexts.


Conditions of successful communication

Communication is usually tied to some intended effect. So putting an advertisement in a newspaper, scolding a child, or engaging in a job interview are forms of communication directed at different goals. Communication is not always successful and the message may fail to achieve the intended effect. Schramm lists four conditions of successful communication. The message should be designed in such a way as to (1) gain the
attention Attention is the behavioral and cognitive process of selectively concentrating on a discrete aspect of information, whether considered subjective or objective, while ignoring other perceivable information. William James (1890) wrote that "Atte ...
of the destination, (2) be understandable to get the meaning across, (3) arouse certain
needs A need is dissatisfaction at a point of time and in a given context. Needs are distinguished from wants. In the case of a need, a deficiency causes a clear adverse outcome: a dysfunction or death. In other words, a need is something required for a ...
in the destination, and (4) suggest a way how these needs can be met. To get the attention of the audience, the message should be accessible to them. When talking, for example, one should talk loud enough to be heard. To ensure that the message is understandable, the sender should be aware of the field of experience of the audience in order to choose words and examples that are familiar to them. Through the relation to the destination's needs, the message can unfold its effect by motivating them to respond. Depending on the message and the intended effect, it can address various different needs, such as the need for
security Security is protection from, or resilience against, potential harm (or other unwanted coercive change) caused by others, by restraining the freedom of others to act. Beneficiaries (technically referents) of security may be of persons and social ...
, status, or
love Love encompasses a range of strong and positive emotional and mental states, from the most sublime virtue or good habit, the deepest Interpersonal relationship, interpersonal affection, to the simplest pleasure. An example of this range of ...
. This aspect plays a central role in all forms of advertisement. A good knowledge of one's audience's character is required to understand which need to arouse and how to arouse it. This depends also on the specific situation and the circumstances, for example, whether the audience is in the right mood and whether the intended response is socially acceptable in the given situation. To unfold its effect, there has to be some form of
action Action may refer to: * Action (narrative), a literary mode * Action fiction, a type of genre fiction * Action game, a genre of video game Film * Action film, a genre of film * ''Action'' (1921 film), a film by John Ford * ''Action'' (1980 fil ...
that the audience can perform to satisfy this need. There are usually many different actions available. The sender may use the message to suggest the action that is most in tune with the effect they intend to provoke. For example, a
political party A political party is an organization that coordinates candidates to compete in a particular country's elections. It is common for the members of a party to hold similar ideas about politics, and parties may promote specific political ideology ...
may use a campaign event to spread fear of an external threat in order to arouse the audience's need for security. The party may then promise to eliminate this threat to get the audience to act in tune with its intended goal: to secure their votes.


Application to mass communication

For
mass communication Mass communication is the process of imparting and exchanging information through mass media to large segments of the population. It is usually understood for relating to various forms of media, as its technologies are used for the dissemination o ...
, the source is usually not an individual person but rather an organization like a
newspaper A newspaper is a periodical publication containing written information about current events and is often typed in black ink with a white or gray background. Newspapers can cover a wide variety of fields such as politics, business, sports a ...
or a
broadcasting network A terrestrial network (or broadcast network in the United States) is a group of radio stations, television stations, or other electronic media outlets, that form an agreement to air, or broadcast, content from a centralized source. For example, ...
. The basic steps like encoding and decoding are the same but they are not performed by a single person but by a group of people, like the employed reporters and editors. The destinations of mass communication are individual people, like the readers of a newspaper. The hallmark of mass communication is that the message reaches a very large number of people. This stands in contrast to face-to-face communication taking place between two or a small number of people. Another important difference is that there is very little direct feedback in mass communication. For example, it happens very seldom that a viewer contacts a broadcast network or that a reader writes a letter to an editor. Feedback is here often more indirect: people may stop to buy a service or to view a program if they are not satisfied with it, usually without providing a reason to the sender for their decision. This lack of feedback makes effective communication more difficult since it is not directly obvious to the sender whether their message had the intended effect. This is one of the reasons why mass communication providers often conduct audience research. This way, they can obtain vital information about their target audience so they can formulate their messages accordingly. It is very difficult to predict the effects of mass communication since the effect differs a lot from individual to individual based on their personality, mood, and current situation. An important factor in this regard is that the effects are not restricted to direct effects on the person receiving the message. Instead, they are also indirect: the receiver is part of a social environment and may share, criticize, and reflect on the message with the people in their environment.


Later developments

Schramm proposed various revisions to his model in the 1970s. As he points out, many developments in the field of
communication studies Communication studies or communication science is an academic discipline that deals with processes of human communication and behavior, patterns of communication in interpersonal relationships, social interactions and communication in differen ...
since his first model have shown that communication is a very complex phenomenon and that his model was too simple to do justice to this complexity. He tries to address these shortcomings by developing a relational model of communication and makes use of the analysis of effects found in Berlo's model of the 1960s. Relational models focus on the relationship between sender and receiver. The relationship includes the totality of the past experiences the communicators have had with each other. It can be based on past face-to-face contact with the other party, as when meeting a friend for dinner, but need not be, as would be the case when reading a newspaper article by a reporter one has never met. But even in this case, past experiences shape what the reader expects from the newspaper and what the reporter expects from the readership. For Schramm, the relationship is a basic requirement of communication since communication is about sharing information or attitudes and, in this sense, being in tune with each other. The relationship determines various aspects of communication, like its goal, the roles played by the participants, and the expectations they bring to the exchange. The goal is what the communicators intend to achieve by communicating. In the instructional context, the goal is to transmit information while
performance arts Performance art is an artwork or art exhibition created through actions executed by the artist or other participants. It may be witnessed live or through documentation, spontaneously developed or written, and is traditionally presented to a pu ...
are about entertaining the audience. The relationship also determines the role of the participants. For instruction, this involves the roles of teacher and student. These roles determine how the participants are expected to contribute to the communicative goal, for example, by sharing and explaining information for the teacher role or by asking clarifying questions for the student role. As the background of communication, the relationships also affects how the messages are interpreted. For example, seeing a person as an actor on a stage will lead to one interpretation of their messages while interacting with them during business negotiations would lead to a very different interpretation of the same messages.


Influence and criticism

Schramm's model has been influential both for its criticism of linear transmission models and for its innovations in trying to overcome them. Schramm was one of the first scholars to challenge the
Shannon–Weaver model The Shannon–Weaver model is one of the first and most influential models of communication. It was initially published in the 1948 paper A Mathematical Theory of Communication and explains communication in terms of five basic components: a sour ...
of communication. He objects to it and similar linear transmission models, because, for them, the communicative process ends when the message reaches its destination. He terms them "bullet theories of communication" since communication is seen as a magic bullet that goes from active senders to passive receivers in the form of sending ideas to the receivers' mind. Schramm rejects the idea that the audience is a passive receiver and assigns them a more active role: the audience respondes by generates a new message and sends it back to the original as a form of feedback. Many scholars have followed Schramm in their criticisms of linear transmission models and in emphasizing the importance of understanding communication as a dynamic exchange involving an active audience and feedback loops. Schramm's other innovations have also been influential, like his concept of the field of experience and his development of relational models in his later work. A common criticism of Schramm's model focuses on the fact that it describes communication as a
turn-based In video and other games, the passage of time must be handled in a way that players find fair and easy to understand. This is usually done in one of the two ways: real-time and turn-based. Real-time Real-time games have game time progress cont ...
exchange of information. This means that there is no simultaneous messaging: first one participant sends a message, then the other conveys their own message as a form of feedback, later the first participant responds again, etc. However, these processes often happen simultaneously for many forms of communication. For example, in face-to-face conversations like a
first date A first date is the initial meeting during the dating process of two individuals, in which an effort is made to ask about each other, plan a potential relationship, and/or organize some sort of romantic activity. Aims vary between finding a ...
, the listener usually uses facial expressions and body posture to signal their agreement or interest. This happens while the speaker is talking, the listener does not wait for the speaker to finish before engaging in this form of
non-verbal communication Nonverbal communication (NVC) is the transmission of messages or signals through a nonverbal platform such as eye contact, facial expressions, gestures, posture, and body language. It includes the use of social cues, kinesics, distance (proxemic ...
. This shortcoming of Schramm's model is addressed by so-called transaction models, which allow for simultaneous messaging. The weight of this objection depends on the type of communication analyzed. For some forms, like
pen pals Pen pals (or penpals, pen-pals, penfriends or pen friends) are people who regularly write to each other, particularly via postal mail. Pen pals are usually strangers whose relationship is based primarily, or even solely, on their exchange of le ...
exchanging letters or instant messaging, disregarding simultaneous messages has little impact, but in other cases, it is an important factor. Another criticism of Schramm's model points out that, for Schramm, the information and its meaning exist prior to the communicative act. Communication itself is then just understood as an exchange of messages or meaning. This view is characteristic of transmission models but is rejected by constitutive models. Constitutive models hold that meaning does not exist before the communication but is created in the process. In this regard, the dialog acts as a cooperative process through which meaning is constructed. Such an approach is proposed by
Everett Rogers Everett M. "Ev" Rogers (March 6, 1931 – October 21, 2004) was an American communication theorist and sociologist, who originated the ''diffusion of innovations'' theory and introduced the term ''early adopter''. He was distinguished professor em ...
and Thomas Steinfatt, who elaborate Schramm's interactive approach and combine it with the assumption that the communicators create and share meaning with the goal of reaching a mutual understanding. Similar approaches to communication focusing on the co-construction of meaning are presented by S. A. Deetz and G. Mantovani. A further limitation is that Schramm's model is restricted to communication between two parties. However, there are various forms of group communication where more parties are involved.


References


Notes


Citations


Sources

* *{{cite book , last1=Schramm , first1=Wilbur , title=The Process and Effects of Mass Communication - Revised Edition , date=1971 , publisher=University of Illinois Press , url=https://books.google.com/books?id=112wAAAAIAAJ , language=en , chapter=The Nature of Communication between Humans , isbn=9780252001970 , pages=3-53 Communication studies Communication theory Conceptual modelling Human communication