The person who lights up a room is usually explained after the fact. They are confident, people say, or warm, or comfortable in their own skin. Those descriptions have the awkward property of being unfalsifiable and also unhelpful, since nobody has ever become charismatic by being told to be more comfortable in their own skin.

One group of psychologists tried a different question. Instead of asking what charisma is, they asked what capacity might enable it.

In a 2016 paper in Psychological Science, William von Hippel and colleagues at the University of Queensland ran two studies in which people were rated by their own friends on how charismatic, funny and quick-witted they were. The same participants completed a standard intelligence test, a personality inventory, and a task in which they answered 30 common-knowledge questions as fast as they could. One of the questions was to name a precious gem.

Speed on that task predicted the charisma ratings. It did so after controlling for intelligence and personality, and according to the Association for Psychological Science release describing the work, the researchers had expected IQ to matter more than it did.

This is one study, not settled consensus. It is also a small one, and the problems with it are worth walking through before the finding gets repeated as fact.

What the study measured

The two studies had a combined 417 participants, a figure that comes from the association’s press release rather than the abstract. Charisma was measured with a three-item scale on which friends rated each other. Mental speed in the first study was the speeded naming task; the second study added timed tasks requiring participants to locate a dot or identify a pattern.

Intelligence was measured with the Wechsler Abbreviated Scale of Intelligence, and the participants averaged a score of 115 with a standard deviation of 10.

That last detail does more damage than it looks like it does.

Three reasons to hold this loosely

The first problem is the intelligence comparison, which is the part of the finding that travels furthest. A group averaging 115 with a standard deviation of 10 is a bright and unusually uniform sample. When a variable has little variance in your sample, it has little room to predict anything, which means “speed beat IQ” may partly describe the sample rather than the world. A study drawing from a wider range of scores could plausibly produce a different ranking.

The second problem is closer to circular. The charisma score was built from friends’ ratings on three items, and one of them was quick-wittedness. Asking people how quick-witted their friends are, then showing that quick-witted people are quick at a timed task, is a weaker result than it first appears. How much weaker depends on how the three items loaded together, which is the kind of detail that gets lost when a finding turns into a headline.

The third is what a friend’s rating can and cannot capture. These are judgments by people who already know and like the person. That is a reasonable proxy for social standing inside an existing group. It is not the same thing as the effect a stranger feels when someone walks into a room, which is the phenomenon the popular version of this idea is actually about.

None of this makes the result wrong. It makes it a suggestive finding from 2016 that has not been retested at scale.

The better-evidenced cousin

There is a related claim with far more behind it, and it is worth separating from the first.

In a 2022 paper in the Journal of Experimental Psychology: General, Deming Wang and Ignazio Ziano reported fourteen experiments, thirteen of them preregistered, with a combined 5,160 participants across British, American, Singaporean and Australian samples. Rather than measuring people’s actual mental speed, they manipulated response timing directly, using audio, video and text stimuli, and measured how observers judged the responder.

People who answered a question immediately were seen as more extraverted than people who paused slightly first. The effect appeared in everyday small talk and in mock job interviews, in face-to-face, phone and online formats. The authors traced the mechanism to interpretation: a delay is read as nervousness and passivity. In their hiring scenarios, response timing shifted which jobs mock employers thought applicants suited.

Note what changed between the two papers. The 2016 study asks whether fast thinkers are charismatic people. The 2022 study asks whether a pause changes what observers conclude about you, holding the person constant. The second question is far easier to answer cleanly, and the answer is well supported.

It is also a claim about perception rather than about who someone is. Wang and Ziano point out that response timing is under voluntary control, which makes it a cue that can mislead in both directions.

What this does not license

The obvious misreading is that a person should now answer everything faster in order to seem more magnetic. Nothing here supports that as advice. The 2022 experiments manipulated a slight pause against an immediate response in controlled scenarios; they did not test whether a person who trains themselves to answer quickly becomes better liked over months of real relationships, and a rushed answer that is wrong carries costs the studies never measured.

There is also a fairness point buried in the 2022 findings that deserves more attention than the self-improvement reading. If a pause before answering reads as nervousness, then people who think before they speak, people processing a second language, and people who are simply careful are all being systematically misjudged in interviews. The authors found observers expected introverts to pause longer. That expectation is doing work in hiring decisions regardless of whether it is accurate.

What would settle it

The 2016 charisma result needs a preregistered replication with a wider range of cognitive ability, charisma rated by strangers rather than friends, and a charisma measure that does not contain a speed item inside it. That study would tell us whether mental speed genuinely underlies charisma or whether the original result was partly an artifact of how it was measured.

Until then, the honest summary is split. That fast responses change how observers read you is supported by thousands of participants across four countries and thirteen preregistered experiments. That fast minds are the engine of charisma rests on 417 people, one paper, and a measure with a known weakness in it.

Which is roughly the opposite of how the finding usually gets told.