Not only does your message have to be compelling, but the message deliverer has to be convincingly credible to the recipients. Photo by Nipin Niravath.
You’ve crafted the perfect message.
The writing is tight, the facts check out, the call to action is crystal clear.
Then you hand it to the wrong spokesperson.
Ugh.
It lands with all the impact of a wet napkin on a rainy Monday afternoon.
In Boise.
Welcome to the frustrating reality of persuasive communication: it’s not just what you say. It’s who says it.
The Art of Message Development
In PR, we spend enormous energy on message development. We agonize over word choice, tone and timing.
It’s a tedious, exacting part of the job.
But research on persuasive communication consistently points to a variable we underestimate: the source of the message itself.
Aristotle figured this out roughly 2,300 years ago.
He identified three elements of persuasive communication: ethos (source credibility), pathos (emotional appeal) and logos (logical appeal).
Many professors continue to teach Aristotle in PR courses today because it still works. Let’s talk about the source of a message — the communicator.
The 3 Cs of an Effective Communicator
Researchers have identified three characteristics that make a communicator effective. They call them the Three Cs: credibility, charisma and control.
Each one plays a distinct role in whether your audience believes what they’re hearing.
1) Credibility
A credible source has expertise, recognized status or prestige, and the communication competence to effectively convey a message . But the single most persuasion-enhancing quality may be sincerity and genuineness — the perception that the source is trustworthy and unbiased.
One phrase I’ve cited for years as a PR pro is: perception is reality.
Here’s what makes sincerity particularly powerful: audiences are especially likely to believe a source who appears to be speaking against their own self-interest. When someone advocates for a position that doesn’t personally benefit them but is the best choice, it reads as authentic.
That’s why a CEO who admits fault during a crisis is often more effective, and more believed, than one who deflects.
Consider Johnson & Johnson’s response to the 1982 Tylenol cyanide crisis.
The company pulled 31 million bottles from store shelves — at a cost of roughly $100 million — before investigators had confirmed the full scope of the problem. J&J prioritized consumer safety over profit, and the public noticed. The brand survived one of the most dramatic product crises in American business history.
That’s credibility in action.
Contrast that with the tobacco industry. Despite massive PR resources (used for an unjust cause from the get-go), it never fully recovered its credibility after decades of misleading the public. Obvious self-interest rendered it unable to persuade, no matter how polished the message.
As the media love to say, “They tried to PR their way out of a crisis.”
This is a topic for another post, but suffice it to say that no amount of PR can make a rotten apple taste good again.
2) Charisma
A charismatic source is likable, familiar and — ideally — similar to the target audience. This explains celebrity endorsements: audiences tend to believe people they admire and feel a connection to.
But here’s the catch. Physical attractiveness, often overweighted in spokesperson selection, is actually the weakest charisma factor. In fact, it can actively undermine credibility.
An audience focused on how a spokesperson looks may forget what they said. Message recall tanks. The attractiveness distraction is real and well-documented.
Similarity matters far more than attractiveness. When a source shares factors like occupation, values, and life experience with the target audience, persuasion is more effective. It’s no surprise why peer testimonials often outperform celebrity endorsements for complex or high-stakes decisions. Your neighbor who lost 30 pounds is more persuasive about a fitness program than a celebrity who’s paid to say they did.
3) Control
A source with control has power or authority over the audience, or the ability to hold them accountable in some way. This explains why employers, teachers and parents are effective persuaders — even when their message construction is, frankly, mediocre.
Authority carries persuasive weight that content alone can’t always generate.
For PR writers, this means carefully considering who in an organization has the kind of authority your audience respects. Is it the CEO? A technical expert? A longtime frontline employee who “gets it”? Someone with the proper credentials?
The right spokesperson depends entirely on who the audience trusts and respects, and not who the client wants to put in front of the camera.
The Sleeper Effect: A Cautionary Tale
Here’s one of the more counterintuitive, unsettling findings in persuasion research: over time, attitudes shaped by noncredible sources can actually increase.
This is called the sleeper effect. People initially reject messages from sources they dislike or distrust. But as time passes, they tend to forget the source while retaining the message. The result? That message you dismissed because it came from someone shady may slowly work its way into your beliefs once the memory of the source fades.
This has uncomfortable implications for anyone trying to protect an audience from misinformation. The initial rejection doesn’t always last — and that’s unsettling.
But here’s the flip side: audiences with a strong, established relationship with a credible source are better equipped to resist it. The trust you build now is the counter-programming. Be strategic, be consistent and be credible from the start — because you’re not just building your reputation. You’re helping your audience build their defenses.
The Trust Crisis Is Your PR Problem Now
The Edelman Trust Barometer is an annual global survey tracking public trust in government, media, businesses and NGOs. It’s documented a sustained, years-long decline in institutional credibility. Medicine, law, religion, higher education, and media have all lost ground with increasingly skeptical publics.
For PR professionals, this is a challenge and an opportunity.
In a low-trust environment, source credibility becomes even more critical. Organizations that have consistently communicated honestly, taken accountability for mistakes, and treated their publics with respect carry credibility that can’t be manufactured overnight.
You can’t fake the 3 Cs. You either have them or you don’t. And audiences are getting better at telling the difference every single day.
The 3 Big Takeaways
- The source of your message matters as much as the message itself — Credibility, charisma and control (the 3 Cs) directly shape whether your audience believes you.
- Sincerity is the most powerful credibility-builder — Sources perceived as unbiased, or willing to speak against their own self-interest, are consistently the most persuasive.
- Organizations that have earned credibility through honest, consistent communication have a meaningful advantage — In a declining-trust environment, you cannot fake, purchase or spin your way into credibility.
Who are the most memorable speakers you’ve heard and why? Does your organization have a credible spokesperson? Do share!
Stay authentic — because credibility is the one thing money can’t buy and the wrong spokesperson can destroy it overnight.
Jeffery E. Pizzino, APR (seen here in a vintage photo circa 1983 serendipitously doing a Clash impersonation in a since-forgotten location) is a spin-free public relations pro who is passionate about telling the why of your story with clarity, impact and authenticity. He began his PR career in 1987 at Ketchum Public Relations in New York City but has spent the majority of his career as a solopreneur. He’s the Chief Authentic Officer of the Johnson City, TN-based public relations firm, AuthenticityPR. He also functions as the fractional CCO for his clients.
Jeff has an MBA in Management from Western International University and a Bachelor of Arts degree in Communications — with an emphasis in PR — from Brigham Young University (rise and shout!). He’s also accredited in public relations (APR). This Milwaukee, Wisconsin native holds an Italian citizenship and plans to live and work there someday. Jeff and his storyteller wife Leticia have four children and four grandchildren. In his extremely limited nonwork hours, he studies Italiano, practices guitar, write songs, gardens, works out, disc golfs, reads, listens to New Wave music, serves as an assistant communication director in his church, watches BYU football, enjoys watching the original Mission Impossible TV series, and plays board games (mostly Dominion and Seven Wonders). No, this guy’s never bored and looking for something to do. Email Jeff.
