How to Read People: 9 Signals That Actually Mean Something

Most of what passes for "reading people" is folklore: crossed arms mean defensiveness, looking up and to the left means lying, a firm handshake means confidence. None of it holds up. What does hold up is less dramatic and far more useful — and it starts with throwing out the idea of a single tell.

Why the usual advice fails

The largest review of deception cues ever run — Charles Bond and Bella DePaulo's analysis of more than two hundred studies — found that almost every individual behaviour people associate with lying is either unrelated to it or so weakly related that it is useless on its own. Liars do not look away more. They do not fidget more. They do not touch their nose. People who are simply nervous, cold, bored or thinking hard do all of those things constantly.

The same problem sinks most "body language" reading. Crossed arms are the most comfortable way to stand in a cold room. Broken eye contact is normal in half the cultures on earth and in most people while they think. A gesture on its own tells you almost nothing about what is going on inside someone's head, because the same gesture has a dozen ordinary causes.

The rule that makes any signal useful

Everything that follows depends on three words: baseline, change, cluster.

Baseline is how this particular person behaves when nothing is at stake — how fast they talk, how much they move, how much eye contact they naturally make. You get it in the first few minutes of any conversation, on neutral topics, and you get nothing useful without it. A person who never makes eye contact is not hiding something when they avoid your eyes. A person who always makes eye contact and suddenly stops might be.

Change is a departure from that baseline, and the important question is always when it happened — what was being said at the exact moment they shifted. The topic is the information. The gesture is only the flag.

Cluster means you wait for two or three signals to arrive together before you take any of them seriously. One change is noise. Three changes at the same moment, on the same topic, is a pattern.

Nine signals worth watching

1. The pause that arrives late

People answer easy, honest questions at a fairly constant speed. When a question gets specific and the answer has to be assembled rather than remembered, the gap before the reply grows — and it grows on that question only. Watch for the pause that was not there a minute ago. Then notice what you asked.

2. The story that thins where it should thicken

Real memories get more detailed as you move towards the interesting part: who said what, where they were standing, what happened next. Invented or edited accounts do the opposite. They are rich on the setup and suddenly vague at the centre — "and then, you know, it just sort of ended." A story that loses resolution exactly where it should gain it has usually been trimmed.

3. Where the torso points

Faces are trained. Torsos and feet mostly are not. In a group, people angle their bodies towards the person they are actually attending to, and towards the exit when they want to leave — while their face keeps smiling at you. If someone's feet have turned towards the door, the conversation is over for them, whatever their mouth is doing.

4. The self-soothing spike

Under stress, people comfort themselves without knowing it: a hand to the neck, a tug at a collar or sleeve, running fingers through hair, rubbing the thighs. Everyone does this sometimes, which is why the gesture alone is meaningless. What matters is a burst of it tied to a topic. When the neck-touching starts the moment you mention the budget, the budget is the thing.

5. Which smile you are getting

A genuine smile involves the muscles around the eyes; the skin at the outer corners creases and the cheeks lift. A social smile is mouth only. Neither is "true" or "false" in itself — the social smile is polite, not deceptive — but the difference tells you whether a person is pleased or merely being pleasant. It is most useful when you are about to rely on their enthusiasm.

6. Stalling moves

Repeating the question back ("Did I see the email?"), asking for it to be rephrased, a sudden interest in their drink, a laugh that fills the gap — these buy time. Everyone stalls occasionally. Stalling that appears on one subject and nowhere else is telling you the subject needs thinking about, which usually means there is something to think about.

7. Language that suddenly steps back

Listen for the shift from warm and specific to formal and distant. "Sarah" becomes "that woman." "I didn't" becomes "I did not." "We" becomes "the team." People put verbal distance between themselves and things they are uncomfortable owning. When someone's vocabulary goes cold on one topic, the topic is hot.

8. How they treat people who cannot help them

This is the one that predicts the future. How a person speaks to a waiter, a receptionist or a junior colleague is how they will speak to you once they no longer need anything from you. Charm aimed upward is a tactic. Courtesy aimed downward is character. It is the single most reliable read available and it costs nothing to make.

9. What they steer back to

Everybody has a subject they return to unprompted — the promotion, the ex, the money, the argument. Whatever a person circles back to three times in an hour is what is actually on their mind, regardless of what the meeting is supposedly about. You do not need to detect anything. You only need to count.

How to check a read without accusing anyone

A read is a hypothesis, not a conclusion. The way to test it is to name what you noticed and ask an open question, leaving the conclusion out entirely.

If you were right, you have just given the other person an easy way to tell you. If you were wrong, you have lost nothing and learned something about their baseline. Either way the conversation is better than the one where you silently decided they were lying.

The short version

Forget individual tells. Establish how the person behaves when nothing is at stake, watch for changes from that, wait for changes to cluster, and — above all — note the topic that was on the table when they appeared. Then ask a good question instead of reaching a verdict.

The full playbook for reading people, power and persuasion

The Unfair Advantage takes the psychology of how people read, move and manipulate each other — decoded from two hundred books — and turns it into one two-hour read. Chapter One is free and complete.

Read chapter one free →