Think about the last time you relied on someone at work and it went well. You probably didn’t notice. The update arrived before you had to chase it. Your question got a straight answer. When the plan changed, someone told you why. Trust rarely announces itself. Mostly it is small things the other person sees you do, often enough that they stop needing to check.

Most advice about trust asks you to be something: more open, more authentic, more consistent. That is hard to act on, because you cannot check tomorrow morning whether you were more authentic. Behaviour you can check. So Trust Leader works from twenty behaviours, and each one is something another person could see you do, or see you not do.

What are the twenty behaviours that strengthen trust?

They sit under the five Trust Questions: the things someone is quietly working out about you before they decide to rely on you. Here they are, group by group, with a word on what each looks like from the other side of the desk.

Do they believe what I say? (Clarity & Honesty)

When these are there, people stop reading between your lines. Your answer is the answer, and they don’t go and check it with someone else. When they’re missing, nobody calls it dishonesty. People just start asking a second person. Picture a team leader who tells her own team a restructure is nothing to worry about, while telling the manager next door it might mean fewer roles. Both may be fair readings of an uncertain situation. But the two teams share a kitchen, and the next time she says something is fine, nobody quite believes her.

  1. Say what is true without using vague or confusing language.
  2. Share relevant information openly, not selectively.
  3. Communicate consistently with different people on the same issue.

Do they believe I’ll do what I said? (Delivery & Consistency)

This is the group people feel most directly, because it turns up in their own diary. When it’s working, they plan around your dates without quietly adding a margin. When it isn’t, they chase. Take an analyst who knows on Tuesday that Friday’s figures will be late, and says nothing because she still hopes to catch up. On Friday the account manager finds out at the same moment as the client. The delay was a nuisance. Hearing about it last is the part he remembers.

  1. Set and confirm clear expectations before work begins.
  2. Give updates on progress and raise issues early when there are risks or delays.
  3. Pause before responding when under pressure.
  4. Apply the same standards in tone, decisions and communication across people and situations.

Do they believe I can handle what’s needed? (Capability & Realism)

Here the other person is asking whether you know the size of what you’ve taken on. They don’t need you to say yes to everything. They need your yes to mean something. A new supervisor who agrees to every request in her first month looks keen for a few weeks. Then two things slip at once, and her manager starts checking everything she has accepted. Compare the supervisor who says, “I can have this done by Thursday, but not the other piece as well.” That is less impressive in the moment and far easier to rely on.

  1. Only agree to what you can realistically deliver and control.
  2. Prepare before key interactions and decisions.
  3. Ask for support when needed.
  4. Say clearly when something cannot be delivered.

Do they feel I really understand them? (Understanding & Connection)

People can tell very quickly whether you are listening or waiting for your turn. When these behaviours are present, they bring you problems early, because they expect to be heard properly. When they’re absent, you get the tidied-up version, or nothing. Think of someone who raises a worry about her workload in a one-to-one and is offered a solution before she has finished the sentence. The solution might even be a good one. What she learns is that the full story wasn’t wanted, and next time she tells a shorter one.

  1. Listen and let others finish before responding.
  2. Ask questions and check your understanding before replying.
  3. Acknowledge how others feel before responding to the task.
  4. Show openness to others’ ideas, even when you disagree.

Do they believe I act with their interests in mind? (Fairness & Consideration)

This group answers where people stand with you, especially when a decision lands on them or when they’re not in the room. It is usually answered by small things. A manager reworks the shift rota over the weekend, and the team find out from the new rota on Monday morning. Nobody has been harmed, exactly. But each of them now knows that decisions about their week can be made without them, and they will read the next change in that light. Five minutes on Friday, explaining what was changing and why, would have answered the question before anyone asked it.

  1. Address issues directly with the person involved.
  2. Involve people in decisions that affect them.
  3. Explain the reasoning behind decisions that impact others.
  4. Give credit to others for their contribution.
  5. Consider how your actions may affect others before acting.

Why these behaviours and not others?

Because each one does a job. It isn’t on the list for being a nice thing to do.

None of these behaviours works because it is a good thing to do. Each one closes a gap between what someone expected of you and what they got.

Look at the first three groups that way and they turn out to be one discipline. The capability behaviours (8 to 11) stop the gap opening in the first place: you only commit to what you can control, you prepare, you ask for help before you need it, and you say plainly when something can’t be done. The delivery behaviours (4 to 7) manage the gap once work is under way. You set the expectation, you update it as things change, and you don’t become a different person under pressure. The clarity behaviours (1 to 3) do the same for information rather than commitments. Saying the same thing to three different people isn’t a courtesy. It’s the same problem in a different medium.

That is twelve of the twenty doing one job: keeping what you said and what happened close enough together that nobody has to guess.

The fairness behaviours (16 to 20) do something different. They shape how a decision reaches the people it lands on. Did you take it to them directly? Did they have a say? Did you explain your reasoning? Did you notice who did the work?

The understanding behaviours (12 to 15) are the ones people expect on a list like this, and they work for a reason that’s easy to miss. Our definition of trust is someone’s confidence in you with something they care about. You can’t act on what someone cares about until you know what it is. The only way to find out is to listen properly, check what you heard, and stay open when they say something you didn’t expect. So listening isn’t a pleasant extra. It’s how you get the information every other group depends on.

Which of these does research actually support?

The alignment argument is the best supported part of the list.

Tony Simons described behavioural integrity as the alignment a person perceives between what you say and what you do. You can’t audit it from your own side, because it is their judgement about your pattern, not your view of your own intentions. That is the mechanism behind behaviours 1 to 7. It is also why behaviour 3 matters as much as it does: a different message for a different audience is a gap between word and deed that someone will eventually see.

Consistency is also the strongest single influence anyone has measured. A 2026 meta-analysis pooled 404 effect sizes from more than eight thousand people and found that how consistently a partner reciprocated mattered more than anything else tested. Those were repeated laboratory games rather than working relationships, so the direction travels further than the rate does.

Behaviour 18 has direct support. A longitudinal study by Jason Colquitt and Jessica Rodell found that the explanations people receive predict how much they trust later, not just how they feel at the time.

Behaviour 5 has an unusual piece of evidence behind it. Maurice Schweitzer and colleagues compared trust damaged by unreliability with trust damaged by deception. Unreliability recovered as behaviour improved. Deception did not recover at all, even when the person’s later behaviour was good. That is the strongest argument on this list for raising a problem early. Not because early news is pleasant, but because concealment costs more than the failure it hides.

And the reason early updates are rare is well documented. Sidney Rosen and Abraham Tesser named the MUM effect in 1970: people are reluctant to pass on bad news, even when they had nothing to do with it. Behaviour 5 asks you to work against a documented instinct, which is why it needs practice rather than agreement.

Where does the evidence stop?

At behaviours 12, 13, 14, 15 and 19.

We could not find direct evidence that listening, checking understanding, acknowledging how someone feels, staying open to their ideas or giving credit cause another person to trust you more. The studies we would want don’t appear to exist, and we would rather tell you that than dress up something adjacent.

What we have instead is an argument. Behaviours 12 to 15 follow from the definition: you can’t act on what someone cares about without finding out what it is. Behaviour 19 is our own thinking, and it comes from watching the same thing go wrong again and again. The credit itself matters less than whether people believe you notice.

Treat those five as our position rather than a finding, and test them against your own experience. If they don’t hold there, they don’t hold.

Which behaviour should you start with?

The one the other person would notice.

Working through all twenty is not the point. In our experience, doing all of them a little achieves less than doing one of them properly. So start with a person rather than the list. Who do you need to rely on you, for something specific? Which of the five questions is actually in doubt for them? The behaviour that answers that question is your starting point.

Trust lives with specific people, in specific situations. A behaviour practised in general, on nobody in particular, is a habit without an audience.

What this list is not

It is not a personality test, and it is not a score. The behaviours describe what a person could observe, which means they say nothing about who you are and everything about what someone has experienced from you.

Nor is it a ranking. Behaviour 1 is not more important than behaviour 20. The numbers are an index, nothing more. Which behaviour matters most depends entirely on which of the five questions the other person is quietly asking.

Each of these has an opposite. Those are the behaviours that erode trust, and they pair one to one with the twenty here.