Interpersonal communication is defined by communication scholars in numerous ways, usually describing participants who are dependent upon one another and have a shared history. Communication channels, the conceptualization of mediums that carry messages from sender to receiver, take two distinct forms: direct and indirect.

Direct channels are obvious and easily recognized by the receiver. Both verbal and non-verbal information is completely controlled by the sender. Verbal channels rely on words, as in written or spoken communication. Non-verbal channels encompass facial expressions, controlled body movements (police present hand gestures to control traffic), color (red signals 'stop', green signals 'go'), and sound (warning sirens).

Indirect channels are usually recognized subconsciously by the receiver, and are not always under direct control of the sender. Body language, comprising most of the indirect channel, may inadvertently reveal one's true emotions, and thereby either unintentionally taint or bolster the believability of any intended verbal message. Subconscious reception and interpretation of these signals is often described with arbitrary terms like gut-feeling, hunch, or premonition.

Context refers to the conditions that precede or surround the communication. It consists of present or past events from which the meaning of the message is derived, though it may also, in the case of written communications, depend upon the statements preceding and following the quotation in question. Immediate surroundings may also color the perceived meaning of words; normally safe discourse may easily become contextually ambiguous or offensive in a restroom or shower hall. These influences do not constitute the message by themselves, but rather these extraneous nuances subtly change the message's effective meaning. Ultimately, context includes the entire world, but usually refers to salient factors such as the following:

Physical milieu: the season or weather, current physical location and environment
Situational milieu: classroom, military conflict, supermarket checkout
Cultural and linguistic backgrounds
Developmental progress (maturity) or emotional state
Complementary or contrasting roles: boss and employee; teacher and student; parent, child, and spouse; friend or enemy; partner or competitor

See also

• Coordinated Management of Meaning
• Nonviolent Communication
• Decision downloading
• Friedemann Schulz von Thun

References and further reading

• William Ury, Getting Past No: Negotiating Your Way from Confrontation to Cooperation, revised second edition, Bantam, January 1, 1993, trade paperback, ISBN 0-553-37131-2; 1st edition under the title, Getting Past No: Negotiating with Difficult People, Bantam, September, 1991, hardcover, 161 pages, ISBN 0-553-07274-9
• William Ury, Roger Fisher and Bruce Patton, Getting to Yes: Negotiating Agreement Without Giving in, Revised 2nd edition, Penguin USA, 1991, trade paperback, ISBN 0-14-015735-2; Houghton Mifflin, April, 1992, hardcover, 200 pages, ISBN 0-395-63124-6. The first edition, unrevised, Houghton Mifflin, 1981, hardcover, ISBN 0-395-31757-6
• Douglas Stone, Bruce Patton, and Sheila Heen, foreword by Roger Fisher, Difficult Conversations: How to Discuss What Matters Most, Penguin, 1999, ISBN 0-14-028852-X
• Barnett Pearce, Making Social Worlds: A Communication Perspective, Wiley-Blackwell, January, 2008, ISBN 1-405-16260-0