Expert power is the influence a person holds because others believe that person has superior knowledge, skill, or judgment in a specific area. First formally described as one of five social power bases in the late 1950s by psychologists John French and Bertram Raven, expert power sits alongside legitimate power (from a formal title), reward power (from the ability to hand out benefits), coercive power (from the ability to punish), and referent power (from personal likability or charisma). What makes expert power distinctive is that it is entirely granted by the people around the expert, and it can vanish the moment those people stop believing in the expert’s competence.
How Expert Power Differs from Other Forms of Influence
Legitimate power comes bundled with a role. A newly promoted manager has it on day one, whether or not anyone in the room respects their abilities. Coercive and reward power work through carrots and sticks. Referent power comes from being personally magnetic. Expert power, by contrast, has to be earned through demonstrated competence, and it only extends as far as the domain the person is known for. A brilliant oncologist does not automatically carry expert power in a conversation about tax law. This domain specificity is one of its defining features and one of the reasons people sometimes underestimate how narrowly it operates.
Research on leaders who rely primarily on expert power places it in a category sometimes called “soft power,” alongside referent and informational power. A study examining how followers respond to different power bases found that people who perceived their leaders as using soft power, including expert power, reported higher levels of self-directed motivation and genuine engagement with their work. Leaders who leaned on harder bases of power, like coercion, did not get the same motivational response.1PubMed Central. Examining the Relationship Between Leaders’ Power Use, Followers’ Motivational Outlooks, and Followers’ Work Intentions
This does not mean expert power is always gentle or collaborative. A person wielding it can be dismissive, condescending, or authoritarian in practice. The “softness” label refers to how it is acquired, not how it feels on the receiving end. Someone who constantly reminds you they know more than you is still trading on expert power, just doing it ungracefully.
What Makes Expert Power Persuasive
When you believe someone knows what they are talking about, you process their message differently. You are more likely to accept their conclusions without scrutinizing every detail, and less likely to push back when your own instincts disagree. This is a well-documented cognitive shortcut: perceived expertise acts as a credibility signal that changes how deeply you evaluate the argument itself.
But expertise does not work in isolation. A classic study on persuasion found that while an expert and trustworthy source generated the most opinion change overall, trustworthiness was actually the stronger driver. A trustworthy communicator was more persuasive whether they were perceived as an expert or not.2Personality and Social Psychology Bulletin. Better Liked than Right This is a finding worth sitting with: being right matters less than being trusted, at least when it comes to changing someone’s mind. Expert power, in other words, needs a foundation of trust to reach its full potential. An expert who seems untrustworthy, perhaps because of a perceived conflict of interest, can lose persuasive force even when their knowledge is genuinely superior.
Later research has examined how expertise and trustworthiness interact when people encounter corrections or retractions. One set of experiments found that both expertise and trustworthiness independently affected whether people believed a retraction of previously stated information, and that these effects held even when the perceiver had a personal stake in whether the original claim was true.3PubMed Central. The independent effects of source expertise and trustworthiness on retraction believability: The moderating role of vested interest The practical implication is that expert power and trust-based credibility are not interchangeable. They each do separate work in your mind when you are deciding whether to accept new information.
Expert Power in the Workplace
In organizational settings, expert power consistently shows up as one of the most constructive bases of influence a leader can rely on. A study of leader power and subordinate outcomes found that expert power was positively associated with both organizational commitment and effectiveness. Legitimate power was also linked to commitment, but coercive power was negatively associated with effectiveness, meaning that leaders who relied on threats and punishment actually got worse outcomes from their teams.4The International Executive. Leader power and subordinates’ organizational commitment and effectiveness: Test of a theory in a developing country
This makes intuitive sense. When your boss seems to genuinely understand the work, you are more willing to follow their direction and more likely to internalize the goals of the organization. When your boss’s primary tool is “do this because I said so” or “do this or you are fired,” compliance is brittle. You follow the instructions when someone is watching and disregard them when no one is.
Expert power also shapes informal dynamics in ways that formal titles do not. In many workplaces, the person others turn to for advice is not the person with the highest rank. It is the person who has solved similar problems before, who understands the technical details, or who has a track record of being right. This informal expert status can be more durable than a job title, because it is continually validated by results rather than conferred once and assumed to persist.
How People Decide Who Counts as an Expert
The perception of expertise is not purely rational. People rely heavily on surface signals, especially credentials, titles, and the way someone communicates. In the context of online health information, research found that people searching for health advice were keenly aware of authors’ credentials and perceived authors with medical credentials to have a higher level of expertise, rating their information as more credible.5PubMed. Believing in Expertise: How Authors’ Credentials and Language Use Influence the Credibility of Online Health Information This makes sense as a quick filtering heuristic. The problem is that it also makes people vulnerable to credentialism, the assumption that a credential automatically guarantees competence in a specific situation.
Language also matters. How someone writes or speaks, whether they use the jargon and register associated with a field, can inflate or deflate perceived expertise independent of what they actually know. Someone who sounds like a doctor is more readily treated as one, even in contexts where their actual medical training is unknown. This creates an opening for people who have mastered the language of a field without mastering the substance.
Confidence is another powerful cue. People tend to attribute expertise to those who express certainty, even when that certainty is unwarranted. This creates a perverse incentive: the people who know the most about a topic are often the ones most aware of its complexity and most likely to hedge, while those with shallower knowledge may project the kind of blunt confidence that reads as expertise to a lay audience.
Gender and the Attribution of Expertise
Expert power does not land the same way for everyone. Gender plays a documented role in whether a person’s expertise is recognized and accepted. Research on women in leadership positions found that group members reported the most dissatisfaction with women leaders who had been appointed and trained as experts but lacked formal legitimacy for their role. These leaders were seen as violating expectations by presuming expertise on a task perceived as masculine, even though their actual knowledge was the same as their male counterparts.6Psychology of Women Quarterly. Empowering Token Women Leaders
This finding highlights a trap that exists for women attempting to build expert power in male-dominated fields. The expertise itself is not the issue; the social permission to claim it is. Without formal legitimacy, such as a title or explicit organizational endorsement, a woman asserting expert knowledge on a stereotypically male topic can face backlash that a man with identical qualifications would not. The implication is that expert power is not just about what you know. It is also about whether the people around you are willing to see you as someone who knows it.
This dynamic extends beyond gender to any context where stereotypes about who “looks like” an expert shape perception. Race, age, accent, and institutional affiliation all influence whether expertise is credited or questioned. Expert power is, in this sense, partly a social construction. It depends on knowledge, yes, but also on whether the audience’s mental model of “expert” includes someone who looks and sounds like you.
Expert Power in Public Health and Policy
Few contexts reveal the real-world stakes of expert power more clearly than public health crises. During the COVID-19 pandemic, trust in experts became a measurable predictor of whether people took protective actions. One study found that trust in health experts was associated with greater perceived severity of COVID-19 and greater perceived benefits of taking action, which together led to higher uptake of recommended behaviors such as masking and social distancing. Trust in health experts turned out to be a stronger predictor of protective behavior than trust in national political leadership.7PubMed Central. Trust in experts, not trust in national leadership, leads to greater uptake of recommended actions during the COVID-19 pandemic
This distinction matters. In a crisis, the question is not just “who has formal authority” but “who does the public believe actually understands the problem.” Political leaders have legitimate power by virtue of their office, but expert power in health matters resides with scientists, physicians, and public health officials. When those two sources of authority align, compliance is high. When they diverge, people tend to follow the one they see as more competent on the specific issue at hand.
Separate research on compliance with public health orders reinforced this pattern, finding that explicitly involving experts in decision-making processes increased citizens’ willingness to comply with policy directives. Consultation with experts was one of the largest effects identified, alongside shared political identity between the citizen and the official issuing the order.8Political Research Quarterly. Compliance with Public Health Orders: The Role of Trust, Representation, and Expertise The takeaway for policymakers is straightforward: visibly including experts in the process is not just good governance but a concrete tool for getting people to follow through.
When the Expert Is an Algorithm
The rise of artificial intelligence has introduced a new wrinkle into how people relate to expert power. When a recommendation comes from an AI system rather than a human, people’s reactions depend heavily on whether they perceive the AI as competent, and that perception functions in essentially the same way as expert power with a human source. Research on AI-supported decision making showed that people’s willingness to follow algorithmic advice was mediated by the AI agent’s perceived competence, which the researchers explicitly identified as expert power.9Proceedings of the ACM on Human-Computer Interaction. Who is the Expert? Reconciling Algorithm Aversion and Algorithm Appreciation in AI-Supported Decision Making
This creates a fascinating tension. Some people exhibit “algorithm aversion,” a reluctance to trust machine-generated recommendations even when the machine performs better than human experts on measurable criteria. Others show “algorithm appreciation,” an inclination to trust the machine precisely because they see it as less biased or more consistent than a human. In both cases, the underlying mechanism is the same one that governs how we respond to human expertise: do I believe this source knows what it is talking about?
As AI tools become more embedded in medicine, finance, hiring, and daily decision making, the question of how expert power transfers to non-human agents will grow more pressing. An AI diagnostic tool, for instance, needs to be perceived as competent to actually change physician behavior. If doctors do not attribute expert power to the system, they will override or ignore its recommendations regardless of its accuracy. Designing systems that earn that perception without overpromising is an active challenge in human-computer interaction research.
How Organizations Are Structured Around Expertise
Expert power does not just operate between individuals. It shapes the structure of entire organizations. In what researchers have called “technocratic” organizations, expertise has largely replaced rank as the primary basis of authority. These organizations are characterized by flattened hierarchies, a split between “expert” and “non-expert” roles, reduced emphasis on climbing internal job ladders in favor of external credentials, and flexible decision-making structures that shift authority depending on who has the relevant knowledge for a given problem.10Organization Studies. Technocratic Organization and Control
Technology companies, consulting firms, research institutions, and many healthcare organizations fit this model to varying degrees. In these settings, the traditional manager who oversees work they do not deeply understand is less common. Authority flows toward whoever can solve the problem at hand, which means power shifts depending on the project. A data scientist might lead a product decision one week, and a marketing strategist might lead the next.
This structure has real advantages: decisions are more likely to be informed by actual knowledge, and people with genuine expertise are empowered to act on it. But it also has downsides. When credentials become gatekeeping tools, organizations can lock out capable people who gained their knowledge through unconventional paths. And when expertise is the currency of authority, internal politics often take the form of credential disputes: arguments over whose experience is more relevant, whose methods are more rigorous, whose field has more to say about a given problem. These disputes can be as petty and destructive as any power struggle in a traditional hierarchy.
Why Expert Power Can Fail
Expert power has a handful of failure modes worth understanding. The most straightforward is domain creep, when someone who is genuinely expert in one area begins to speak with equal confidence on unrelated topics and the audience does not notice the shift. A Nobel laureate in physics who opines on nutrition policy still carries the aura of expertise, even though their knowledge in that second domain is no better than anyone else’s. Expert power, once established, can bleed across boundaries in ways that are not warranted.
A second failure mode is the erosion of trust. Because expert power depends on others’ belief in your competence, anything that shakes that belief, a public error, a perceived conflict of interest, or even association with an unpopular position, can cause it to collapse quickly. And rebuilding it is harder than building it in the first place. Once an audience has reclassified you from “expert” to “questionable,” you face a steeper hill than someone they have never heard of.
A third risk is less obvious: the expert’s own resistance to updating. Deep expertise can breed rigidity. When someone has spent decades mastering a framework, new evidence that challenges that framework can feel like a personal threat rather than an intellectual opportunity. The person whose expert power was built on a particular set of conclusions may unconsciously resist conclusions that would undermine the very knowledge that gave them influence. This does not mean experts are usually wrong. It means that the social dynamics of expert power can, in some cases, slow down the very process of knowledge revision that science depends on.
Finally, expert power is vulnerable to the broader cultural mood around expertise itself. In periods of high institutional trust, expert opinions carry weight almost automatically. In periods of widespread skepticism, even well-credentialed, careful experts can struggle to be heard. The relationship between a society and its experts is not static. It responds to political polarization, lived experience with institutional failures, and the availability of competing information sources. During the pandemic, trust in health experts predicted protective behavior, as noted earlier. But the erosion of that trust in some populations was itself a story about how expert power can weaken under sustained political pressure, even when the underlying knowledge is sound.
Building Expert Power Without a Formal Credential
Not everyone who carries expert power has a degree to show for it. In many industries, demonstrated competence is a more powerful signal than a certificate on the wall. Open-source software developers, for instance, build expert reputations through code that other people use and rely on. Experienced tradespeople carry expert power on a job site that no engineering degree automatically confers. Self-taught data analysts who can consistently produce accurate forecasts earn the same deference as their formally trained peers, at least once they have a track record.
If you want to build expert power deliberately, the research points to a few consistent themes. First, domain specificity helps. People trust a focused specialist more than a generalist who claims to know a little about everything. Second, visibility matters: expertise that no one knows about is not expert power. Sharing knowledge, contributing to public discussions, and being willing to explain your reasoning all make your competence visible to the people who might rely on it. Third, and this circles back to the persuasion research, trustworthiness amplifies expertise. Being known as someone who acknowledges uncertainty, admits mistakes, and does not oversell their knowledge makes your expertise more credible when you do assert a strong opinion. The expert who says “I don’t know” when they genuinely don’t know earns more long-term influence than the one who always has a confident answer, because the audience learns that when this person does commit to a position, they mean it.