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You have probably heard that people judge you within two seconds of meeting you. The research says that is actually generous. Some impressions form in a tenth of a second, before you have said a single word.
A tenth of a second is enough
In a well known set of experiments, psychologists Janine Willis and Alexander Todorov showed people unfamiliar faces for just 100 milliseconds, 500 milliseconds, or a full second. Across five experiments with around 200 participants, people rated each face on traits such as attractiveness, likeability, trustworthiness, competence and aggressiveness. Judgments made after only 100 milliseconds matched the judgments people made when they had no time limit.
One tenth of a second. That was all the time people needed to form an impression that closely matched their considered one. (Willis and Todorov, Psychological Science, 2006)
The most interesting part is what extra time did. Todorov summed it up this way: observers simply became more confident in their judgments as the time lengthened. More looking did not change the first verdict much. It just made people feel surer about it.
Even faster than that
Researchers Moshe Bar, Maital Neta and Heather Linz went shorter still. They found that consistent impressions of faces with neutral expressions could form from whatever information was available in the first 39 milliseconds. People were consistent in judging how threatening a face looked, and less consistent in judging how intelligent it looked. The authors read this as a sign that our brains prioritise the traits linked to safety first.
So when we say two seconds, we are being kind. Your first impression has usually been formed long before you reach the handshake.
Snap judgments are not random
It is easy to assume a quick impression must be shallow. Psychologists Nalini Ambady and Robert Rosenthal tested that idea with a meta analysis that pooled results from dozens of studies on very short clips of behaviour, known as thin slices. Across 38 studies, judgments based on short clips predicted real outcomes better than chance, with an average correlation of .39. Clips under 30 seconds were about as predictive as clips lasting up to five minutes.
An average across many studies does not mean any single snap judgment about you is correct. It means first impressions carry real weight in how people respond to you, whether or not they are fair.
What you wear is part of the message
Clothing is one of the first things people can read. In a study published in the Journal of Fashion Marketing and Management, Neil Howlett and colleagues looked at how small changes in a male model’s attire affected how he was perceived, with facial cues removed and only brief exposure. Their starting point is simple: clothing communicates information about the wearer, and first impressions can be heavily shaped by it.
That study used a male model, so we should be careful about stretching it too far. But it fits a clear pattern. People start reading you from the moment you are visible, and your outfit is part of what they read.
Clothes change how you think, too
First impressions are not only about how others see you. In 2015, researcher Michael Slepian and colleagues ran experiments on formal clothing. In one, 54 students were randomly assigned to change into either formal or casual clothes, and those in formal clothes showed more big picture thinking on a visual task. The authors note that larger and more varied samples are needed, so treat it as a promising signal rather than a rule.
The idea behind it is worth keeping: what you wear can shift how you carry yourself and how you approach the moment, not just how you are perceived.
What this does not mean
None of this says a first impression is the truth about you. Snap judgments can be biased and can be wrong. The same research shows that more time gives people more nuanced impressions, so a first impression is a starting point, not a final verdict.
It does mean that the first few seconds are real, and that you have more say in them than you think. You cannot control who is looking. You can control what you give them to read.
Making your first impression intentional
- Decide the message first. Before you choose an outfit, ask what you want someone to feel when you walk in. Capable, warm, creative, calm? Let that lead.
- Start with fit. Clothes that fit your body well read as considered. Knowing your body shape is the quickest way to stop guessing.
- Choose colours that work with your colouring. The right shades make your face look rested and clear, which is the first thing people see.
- Wear what you can forget about. If you are adjusting, tugging or second guessing, that is what people notice. Comfort and confidence travel together.
- Keep it consistent. The way you dress, speak and show up should tell the same story about you.
Frequently Asked Questions
How long does it take to form a first impression?
Studies on faces show people form consistent impressions in as little as 100 milliseconds, and some research points to as little as 39 milliseconds. That is far quicker than the two seconds people usually quote.
Can a first impression be changed?
Yes. Research shows longer exposure leads to more nuanced impressions, and people update their view as they learn more. But the first read does shape how people begin to respond to you, so it is worth being intentional about it.
Does clothing really affect first impressions?
Research suggests it does. Studies show that even minor changes in attire can influence how a person is perceived, and that formal clothing can change the wearer’s own way of thinking.
Make your first impression intentional
Book a consultation and we will work out what suits your body, your colouring and your life, so you show up as yourself with confidence.
Sources
- Willis, J. and Todorov, A. (2006). First impressions: making up your mind after a 100 ms exposure to a face. Psychological Science. PubMed and Princeton University summary
- Bar, M., Neta, M. and Linz, H. (2006). Very first impressions. Emotion. Abstract
- Ambady, N. and Rosenthal, R. (1992). Thin slices of expressive behavior as predictors of interpersonal consequences: a meta analysis. Psychological Bulletin. Summary
- Howlett, N., Pine, K., Orakcioglu, I. and Fletcher, B. (2013). The influence of clothing on first impressions: rapid and positive responses to minor changes in male attire. Journal of Fashion Marketing and Management. Record
- Slepian, M., Ferber, S., Gold, J. and Rutchick, A. (2015). The cognitive consequences of formal clothing. Social Psychological and Personality Science. Association for Psychological Science summary