The statement that "culture is a powerful influence on communication behavior" means that a culture affects how we express ourselves and how we interpret and react to others.
Culture can affects communication in verbal and nonverbal ways. It can influence how we communicate verbally via the words, phrases, metaphors and culture-specific slang between two or more people. It also affects what kind of topics are deemed appropriate for conversation based on cultural norms/values present within a culture’s social environment.
The culture that an individuals are socialized does influences the way they communicate and the way individuals communicate can change the culture. A society culture provides its members with an implicit knowledge about how to behave in different situations and how to interpret others' behavior in such situations.
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