For Schramm, communication has in its most basic form three parts: a
source, a
message, and a destination. The source can be an individual 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, where the message originates in the form of an idea. To share this information, the source needs to
encode 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 (like written or spoken words) or non-linguistic (like pictures, music, or animal sounds). They are then transmitted through a
channel, 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. At this stage,
noise 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. According to the Shannon–Weaver model, communication is an interaction of various components. A source translates a message into a signal using a transmitter. The signal is then sent through a channel to a receiver. The receiver translate the signal back into a message and makes it available to a destination. The steps of encoding and decoding in Schramm's model 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 is one 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, 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. He 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. A field of experience is a
mental frame of reference. It includes past life experiences as well as the attitudes, values, and
beliefs 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 is unable to encode their message in Russian if they have never learned this language. And if a person from an indigenous tribe has never heard of an airplane then they are unable to accurately decode messages about 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 differences, 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
advertisements, 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 later models refer to as social and cultural contexts. == Conditions of successful communication ==