Ethos

How communicators construct credibility and character for an audience.

What ethos means

Ethos concerns the persuasive power of a speaker’s perceived character and credibility. In Aristotle’s account of rhetoric, persuasion can arise from the character conveyed through the speech itself, particularly when an audience sees the communicator as practically wise, virtuous, and well disposed toward them (Aristotle, trans. 2007).

Why it matters

Credibility is not simply a credential that a communicator possesses. It is also performed through language, tone, evidence, appearance, affiliations, and demonstrations of expertise. Audiences continually make judgments about whether a source seems knowledgeable, trustworthy, authentic, or aligned with their values.

How to use it

Look for the signals a message uses to establish authority. Does the communicator cite experience, professional expertise, moral principles, personal sacrifice, institutional status, or similarity with the audience? Consider whether those signals actually support the claims being made.

Example

A physician discussing a medical issue may rely on professional expertise, while a parent discussing the same issue may emphasize lived experience. Both are appeals to ethos, but they construct credibility in different ways.

Questions for the field

What does this concept help you notice in the message?
Which words, images, symbols, or choices provide the strongest evidence?
How might another audience interpret the same message differently?

References

Aristotle. (2007). On rhetoric: A theory of civic discourse (G. A. Kennedy, Trans.; 2nd ed.). Oxford University Press.