Another way to understand classroom communication is to distinguish verbal from nonverbal communication, and intended both unintended forms of communication. As the name suggests, verbal communication is a message or information expressed in words, either orally or in writing. Classrooms obviously have lots of verbal communication; it happens every time a teacher explains a bit of content, asks a question, or writes information or instructions on the chalkboard. Non-verbal communications are gestures or behaviors that convey information, often simultaneously with spoken words (Guerrero, 2006). It happens, for example, when a teacher looks directly at students to emphasize a point or to assert her authority, or when the teacher raises her eyebrows to convey disapproval or disagreement. Nonverbal behaviors are just as plentiful as verbal communications, and while they usually add to a current verbal message, they sometimes can also contradict it. A teacher can state verbally, this math lesson will be fun”, and a nonverbal twinkle in the eye can send the confirm message nonverbally. But a simultaneous nonverbal sigh or slouch may send the opposite message that the lesson will not, in fact be fun, in spite of the teacher's verbal claim.
Whether verbal or nonverbal, however, classroom communications often convey more meaning than is intended. Unintended communications are the excess meanings of utterances; they are the messages received by students without the teacher's awareness or desire. A teacher may say, this section of the text won't be on the test, but read it anyway for background.” But a student may instead hear the message, “Do not read this section of the text.” What is heard is not what the teacher intended to be heard.
Like many public settings that involve a diversity of people, classrooms tend to rely heavily on explicit, verbal communication, while at the same time recognizing and allowing nonverbal communications to occur (Neill, 1991). This priority accounts for the characteristically businesslike style of teacher talk a style that we discuss in detail in the next chapter. A major reason for relying on an explicit, businesslike verbal style is that diversity among individuals increases the chances of their misinterpreting each other. Because of differences in background, the partners may differ in how they expect to structure conversation as well as other kinds of dialog. Misunderstandings may result s ometimes without the partners being able to pinpoint the cause. Later in this chapter we suggest how to minimize these problems.
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