Key Points at a Glance

Communication is the process of transferring information, meaning, or understanding from a sender to a receiver through a channel; Wilbur Schramm (1954) defined it as "the process of establishing a commonness or oneness of thought between a sender and receiver."

The Shannon-Weaver Mathematical Model (1949), originally designed for telephone engineering, identifies: Information Source -> Transmitter -> Channel -> Receiver -> Destination, with Noise as interference at any point. Claude Shannon and Warren Weaver introduced the concept of communication entropy (uncertainty).

Berlo's SMCR Model (1960) expands communication into four components: Source (communication skills, attitudes, knowledge, social system, culture), Message (content, elements, treatment, structure, code), Channel (five senses: seeing, hearing, touching, smelling, tasting), and Receiver (same dimensions as source).

Schramm's Interactive Model (1954) introduced Feedback as a key element. Communication is a two-way process where both sender and receiver are simultaneously encoders and decoders, filtering messages through their Field of Experience.

Aristotle's Rhetorical Model (c. 350 BCE), the oldest communication model, identifies three components: Ethos (credibility of the speaker), Pathos (emotional appeal), and Logos (logical argument). This model underlies modern public communication and political persuasion theory.

Formal Communication Networks: Wheel (all communication through a central hub), Chain (linear, hierarchical), Circle (each communicates with adjacent members), and All-channel (everyone communicates with everyone; maximum participation). Wheel is fastest for simple tasks, while All-channel is most satisfying for complex, creative tasks.

Informal Communication (Grapevine): Unofficial information flow in organisations, named by Keith Davis (1953), who found grapevine information is 75-95% accurate but selective. It spreads fastest in anxiety situations and follows Cluster Chain, Single Strand, Gossip Chain, and Probability Chain patterns.

Barriers to Communication are classified as: (1) Physical: noise, distance, poor infrastructure; (2) Semantic: language differences, jargon, ambiguous words; (3) Psychological: selective perception, emotional state, prejudice, defensiveness; (4) Organisational: hierarchical distortion, information overload, filtering; (5) Cultural: different norms for directness, silence, and eye contact.

Non-Verbal Communication constitutes the majority of face-to-face communication. Albert Mehrabian (1971) found that 7% of meaning is verbal, 38% is vocal (tone, pace), and 55% is non-verbal (body language, facial expressions). Edward Hall (1966) introduced Proxemics, the study of personal space and territory in communication.

Electronic Communication includes email, video conferencing, instant messaging, social media, e-governance portals, and AI-mediated communication. Benefits include speed, reach, and documentation. Risks include information overload, digital divide, cybersecurity threats, loss of non-verbal cues, and asynchronous miscommunication.

Destructive Communication refers to communication patterns that damage relationships, inhibit performance, and create toxic environments. Key patterns include: Criticism (attacking character rather than behaviour), Contempt (disrespect, sarcasm, eye-rolling), Defensiveness (counter-attacking), and Stonewalling (withdrawal), which John Gottman (1994) called the "Four Horsemen" of relationship destruction.

Active Listening, proposed by Carl Rogers and Richard Farson (1957, "Active Listening"), involves giving full attention, withholding judgment, reflecting understanding, and asking clarifying questions. Research shows active listening increases comprehension by 25% and reduces conflict by 40% in organisational settings.