Most advice about becoming instantly likable starts from a flawed assumption: that people are basically accurate judges of how much a new acquaintance likes them, and the only problem is what to do with that information. A 2018 paper in Psychological Science, by Erica Boothby, Gus Cooney, Gillian Sandstrom, and Margaret Clark, suggests the more basic problem is that people systematically underestimate how much others enjoyed talking to them in the first place. The researchers call this the liking gap, and it showed up consistently across several different settings: strangers getting acquainted in a lab, first-year college students meeting their dorm mates, and members of the public meeting each other at a workshop.

Correction (September 16, 2026): The earlier title blurred who did the mirroring and added an unsupported comparison with conscious charm. It now reflects the experiment: participants whose mannerisms were mirrored by a confederate later rated that partner and the interaction more positively.

This is one line of research, not a settled fact about every conversation everyone has ever had, and the studies relied on self-reported liking rather than any independent measure of how a relationship later developed. But the consistency across different groups and settings is worth taking seriously rather than dismissing as a fluke of one lab session.

Some of the “instant” read happens before anyone says a word

Separately from what happens during a conversation, a substantial part of what people mean by being instantly drawn to someone forms before any actual interaction takes place. In a study published in Psychological Science, Janine Willis and Alexander Todorov showed participants unfamiliar faces for just 100 milliseconds, a tenth of a second, and asked them to judge traits including trustworthiness, likeability, and competence. Judgments made after that split-second exposure correlated strongly with judgments made with no time limit at all. Giving people a full second to look, ten times longer, did not meaningfully change the pattern.

This finding is worth taking seriously, but it should not be read as the final word on what makes someone likable. It says something specific and somewhat sobering: a meaningful share of a first impression is locked in from facial structure and expression before a person has had any chance to demonstrate warmth, humor, or competence through their actual behavior. That is not something a person can practice their way out of by trying harder in the moment. It is also not the whole story, because the same research measured snap judgments, not the impression that survives an actual conversation.

The behavior that reliably nudges a real interaction toward liking

Once an interaction is underway, one of the better-established findings in social psychology concerns unconscious mimicry. In a 1999 paper in the Journal of Personality and Social Psychology, Tanya Chartrand and John Bargh had confederates subtly mirror the posture and mannerisms of study participants during a conversation, without the participants noticing. Participants who were mirrored in this way reported liking the interaction more and rated it as going more smoothly than participants who were not mirrored. A separate part of the same paper found that people who scored higher on trait measures of empathy engaged in this kind of nonconscious mimicry more than other participants did, even without being instructed to.

The researchers describe this as the chameleon effect: the tendency for a person’s own posture and mannerisms to shift, without conscious intention, to match whoever they are talking to. It is not a deliberate technique so much as a byproduct of paying close attention to another person, and the studies suggest it is one of the few behavioral levers, distinct from facial appearance, that reliably tracks with how much people report enjoying an interaction.

Warmth gets judged before competence, and it carries more weight

A separate body of work led by Susan Fiske, Amy Cuddy, and Peter Glick, developed into what they call the stereotype content model, has found across dozens of samples that people evaluate others along two consistent dimensions: warmth, meaning perceived trustworthiness and good intent, and competence, meaning perceived capability. Across this research, warmth judgments tend to form faster than competence judgments and tend to carry disproportionate weight in how positively someone is regarded overall, a pattern the researchers argue holds up because reading intent, whether a stranger means you well or harm, mattered more for survival across human history than reading their skill.

The practical implication is a specific one, not a general life philosophy: whatever a person says or does that signals warmth, appearing genuinely interested in the other person, seeming approachable rather than guarded, tends to move the needle on likability faster and more reliably than whatever signals competence or impressiveness does. A person trying to seem instantly impressive by demonstrating expertise is optimizing for the dimension this research suggests matters less in a first encounter.

Putting these findings next to each other honestly

None of these four studies, taken alone, tells the whole story, and each measured something narrower than the sweeping question of instant likability. But read together, they point toward a specific, testable picture rather than folk wisdom. Some of what reads as an instant connection is decided by facial appearance before an interaction even starts, according to Willis and Todorov’s work, and that part is largely outside a person’s control in the moment. Separately, once a conversation is happening, the behaviors that seem to move real liking are quieter and less strategic than most likability advice suggests: unconsciously mirroring another person’s posture and manner, per Chartrand and Bargh, and signaling warmth and genuine interest rather than competence or polish, per Fiske, Cuddy, and Glick’s research. And running underneath all of it, the Boothby et al. finding suggests that people who worry about whether they came across as likable are probably underestimating how well the interaction actually went in the other person’s eyes, regardless of which behaviors they used.

That combination reframes the appeal of trying to be instantly likable as a performance to master. On the available evidence, the more effective version looks closer to being genuinely, visibly interested in the person in front of you and worrying less than most people do about whether it is working.

What this does not prove

The mimicry and warmth research was conducted primarily with participants from Western, largely American and European samples, and it is not established how far these patterns extend to cultures with different norms around eye contact, personal space, or expressions of interest. The liking gap studies measured self-reported enjoyment rather than tracking whether these acquaintances went on to become real friends. And the Willis and Todorov work measured split-second trait judgments from photographs, not the fuller impression that forms across an actual, lived conversation, which can shift considerably from that first snap read. Taken together, this is a body of research pointing in a consistent direction, not a single settled account of exactly how likability works, and no combination of behaviors documented here guarantees that any specific person will feel an instant pull toward another.