Hiring decisions form in under a minute, and a candidate's qualifications have little to do with it
A candidate's resume doesn't carry as much weight as how they look and sound in the room, according to a new meta-analysis of how first impressions form at work.
The study, led by Brian Swider, a professor of business at the University of Florida's Warrington College of Business in Gainesville, Florida, examined 204 independent samples from 145 studies covering different jobs, countries and education levels.
"What we find is that in general people make an overarching impression of other people. Either they are good or they are bad," Swider said.
That overall judgment also colors how people read individual traits. Swider said even warmth and competence, which researchers typically treat as separate, tend to blur together in a first meeting.
"The idea that you're going to meet somebody and think they're really smart, but you don't really like them, is highly uncommon," he said. "The same with the opposite. If you find somebody to be really warm and likable, odds are you're also going to think that they're competent."
The result even the researcher didn't expect
Swider's team set out to compare three types of cues that shape a first impression. The first two are communication style and physical appearance. The third, what researchers call content, is the actual substance of what a candidate says or what appears on a resume, and before running the numbers, Swider expected it to come out on top.
"If you asked me before the study, I would have said content, things like a candidate's GPA or what's listed on their resume, would be the strongest, most consistent predictor of a first impression," Swider said. "It turns out that was the weakest. Instead, what was the most consistent and strongest impact were communication cues."
Communication cues cover a wide range of behavior, most of it nonverbal.
"These are things like your vocal intonation, your facial expressions, whether you're smiling, body movement, whether you're leaning in, using your hands while you talk," Swider said. "Verbal and nonverbal cues about how you're conveying information."
Physical appearance landed in between the two, consistently linked to positive impressions but weaker and more variable than communication style. Swider said that's partly because appearance isn't part of every job, and partly because people simply disagree more about what looks good than they do about what sounds like effective communication.
"I know physical appearance matters and influences people's impressions, but I really didn't think it would trump content cues and job-related characteristics," Swider said.
Why these judgments are so hard to shake
The study also measured how long a first impression lasts, and how strongly it predicts what happens later. Swider's team found a correlation of 0.51 between an impression formed in the first few minutes and that same impression at least a month later, a figure that clears the bar researchers use to define a strong effect.
"Everyone says you never get a chance to make a second impression," Swider said. "Our results show that first impressions are remarkably robust. The stability of an impression made in the first few minutes will be highly correlated with how someone feels about that person a month down the road."
However, a first impression's power to predict actual work outcomes fades somewhat over time. Swider said the correlation between an early impression and outcomes like hiring and performance starts around 0.5 within the first few minutes, but drops to roughly 0.3 after a month, a decline he called modest given how much additional information people typically gather in that window. The effect showed up most strongly in what he calls relational outcomes, like whether a manager wants to mentor someone or extend trust, and slightly less strongly in achievement outcomes like performance ratings and promotions, which tend to run through some kind of structured or documented review process.
How employers can minimize the effect
None of this means organizations are powerless. Swider pointed to a study his team published in 2016 that tracked a highly structured interview process, one where every candidate was asked the same 12 questions in the same order with the same rating scale.
"What we found was that the first handful of questions were really strongly related to the impression that they made in their little chitchat rapport-building conversation before the interview starts," Swider said. "It was basically unrelated to the last handful of questions."
Because interview scores are usually built from an average across all the questions, that early bump or dip carried real consequences.
"If you're getting a bump on a handful of the early questions, that's still going to move people meaningfully," Swider said. "People who were on the cusp of making that top 20% to get a second interview were able to get that bump, or conversely, people were pushed down from that threshold so that they weren't going to get the interview."
Swider's advice for employers who want to limit how much those early impressions skew an interview score starts with structure. Rate candidates more frequently throughout an interaction, involve multiple raters instead of relying on one person's judgment, and consider discounting the earliest exchanges when they're clearly driven by rapport rather than substance. Even so, none of these tactics erase the effect entirely, a reality that echoes the broader research on whether hiring bias can ever be fully eliminated.
Some organizations go a step further and formally build first impressions into their evaluation. Swider described one organization with heavily customer-facing roles, where making a good impression is actually part of the job. That company scored candidates' first impressions as a formal part of the interview, and its own data showed candidates who scored well tended to perform better once hired.
That's the exception, though. Most employers are better served by limiting how much weight a first impression carries than by embracing it, since what organizations can't do, according to Swider, is stop first impressions from forming in the first place.
"We're cognitive misers," he said. "We want to use as little brain power as possible. Thinking is hard. First impressions give us those shortcuts."
