Communication Theories: Media Richness Theory and Channel Expansion Theory

Mediated communication focuses on the channel through which a message is conveyed.

Media Richness Theory suggests matching the richness of the communication channel to the ambiguity of the message. The richer the medium, the better it is for communicating ambiguous messages.
Core Concept: The more ambiguous the message, the richer the medium should be used to communicate the message, to give people different ways into it and to understand the message fully.

Speed of feedback: synchronous (immediate) vs. asynchronous (delayed) capacities. Examples include:
- Speaking directly to someone (immediate feedback).
- Social media interactions such as liking, reposting, or commenting (varying degrees of immediacy).
Ability to personalize messages: tailoring the message to specific individuals.
Nonverbal cues: face-to-face interactions are rich due to the presence of nonverbal cues.
Language variety: the range and complexity of language that can be used.

Rich Media: face-to-face interactions where all senses are engaged, allowing the observation of verbal and nonverbal cues.
- Example: In-person lectures.
Mid-Range Media: electronic media.
- Example: Online lectures (less rich due to lack of nonverbal cues, especially if cameras are off).
Lean Media: mass-produced or mass-printed materials.
- Examples: Memos, letters, printed brochures.

Using a richer medium is advised for ambiguous messages to ensure clarity and control.
Using an overly rigid or lean medium for straightforward information is inefficient, leading to information overload.

Channel expansion theory builds on MRT by adding the concepts of individual experience and social influence.

Considers the message's complexity first and then finds an appropriate channel based on that medium's richness.
Includes individual experience and social influence.

Advises management professionals to select a communication channel that best corresponds with the ambiguity of the message content.

Channel expansion theory acknowledges that people’s experiences with different channels influence perceptions of richness.
Richness is not entirely objective; it's influenced by individual interactions and experiences with the media.

Texting, initially a simple, low-cost medium, has evolved.
The value and richness of a channel can change over time based on technological advancements and user experiences.

The perception of richness in a medium depends on individual interactions and experiences.