Final answer:
Lean media, such as text-based communication, are more effective than rich media in nonroutine and ambiguous communication situations.
Step-by-step explanation:
Lean media are more effective than rich media when the communication situation is nonroutine and ambiguous. This is because lean media, such as text-based communication or email, allow for clearer and more precise communication, reducing the chance of misinterpretation in uncertain situations.
For example, in a business setting, if a manager needs to convey complex instructions or details about a project that may be open to interpretation, using text-based lean media, such as an email, would be more effective than rich media like video or audio, which may not provide the necessary clarity.
Therefore, the statement is true: lean media are better than rich media when the communication situation is nonroutine and ambiguous.