Put your shoes on.

Get dressed.

Start your homework.

Turn the screen off.

Come to the table.

They know what you’re asking.

You know they can do it.

They did it yesterday.

And now they’re refusing, arguing, ignoring you, or suddenly acting like the simplest request in the world is impossible.

This is usually the point where parents start wondering:

Are they actually struggling, or are they just taking the piss?

Because those two things need very different responses.

And I think there is a third possibility we miss all the time.

When a child won’t do something, I tend to ask:

Is this won’t, can’t, or can’t right now?

They can look almost identical from the outside.

But they are not the same problem.

Sometimes it really is won’t

Let’s start here because I don’t think we need to pretend children never simply refuse things they could do.

Kids learn.

They avoid things they don’t like.

They test what happens when they say no.

If arguing for ten minutes has made homework disappear before, arguing can become a pretty effective strategy.

If screaming in the supermarket eventually gets the lolly, screaming has worked.

That matters.

Sometimes the child has the skill.

They have enough capacity in that moment.

They just don’t want to do it.

That is a won’t problem.

And if it is won’t, boundaries, consequences and what the behaviour is achieving may be exactly where we need to look.

The problem is when we assume every refusal belongs in this box.

Sometimes they actually can’t

A parent might say:

“He knows how to do his homework. He just refuses.”

Maybe.

But I want to know what “do your homework” actually requires.

Can he understand the work?

Can he remember the instructions?

Can he organise what he needs?

Can he start without someone beside him?

Can he hold an idea in his head long enough to get it onto the page?

Can he tolerate getting something wrong?

What looks like one simple task from the outside can require a stack of different skills underneath it.

If one of those skills is missing or still shaky, more pressure doesn’t suddenly create it.

That is can’t.

And can’t does not mean the child can never learn it.

It just means we may be asking for something they cannot yet do reliably without more teaching, practice or support.

Then there is can’t right now

This is the one that causes the most confusion.

Because the parent says:

“But I’ve literally seen them do it.”

And they’re right.

The skill exists.

But that doesn’t mean the child can access it equally well in every situation.

Think about yourself.

You know how to stay calm.

You know how to speak respectfully.

You know how to think before you react.

Now try doing all of that after four hours of sleep, a terrible day, too much noise and three people asking something of you at once.

You haven’t forgotten how to communicate.

But accessing your best version of that skill just got harder.

Kids can be the same.

A child might manage getting dressed perfectly on Saturday morning and completely fall apart doing the same thing at 8am on a school day.

They might be able to talk through a problem when they are calm and have almost no useful words in the middle of a meltdown.

They might accept “no” easily one day and lose it over the same answer the next.

The skill did not necessarily disappear.

Their ability to access it changed.

That is can’t right now.

This is why “they know better” doesn’t always help

“They know better” tells me the child has some knowledge.

It doesn’t tell me whether they have the skill.

And even if they have the skill, it doesn’t tell me whether they could actually use it in that moment.

Those are different questions.

A child might know they shouldn’t hit their brother.

That doesn’t automatically mean they can stop the impulse reliably when they are furious.

A child might know what they need to pack for school.

That doesn’t automatically mean they can organise themselves through six steps while someone is rushing them.

A child might know how to ask for help.

That doesn’t automatically mean they can find those words when they are already overwhelmed.

This is where I think we need to slow the judgment down a little.

Not remove the expectation.

Not excuse the behaviour.

Just make sure we know what problem we are trying to solve.

So how do you tell the difference?

You will not always know straight away.

But there are a few things I would look at.

Have I seen this skill reliably?

Not once.

Reliably.

If they struggle even when they are calm, rested and supported, I start wondering whether this is more can’t than won’t.

Does it change depending on the situation?

Can they do it on weekends but not school mornings?

At home but not school?

Before dinner but not after a long day?

If the behaviour changes a lot with time, environment or load, I get more interested in can’t right now.

What happens if I make it easier?

Give one instruction instead of four.

Help with the first step.

Reduce the noise.

Give them a minute.

Does the skill suddenly reappear?

That is useful information.

What happens when refusal works?

If the child can reliably do the task under the same conditions, but arguing keeps getting the demand removed, I become more interested in won’t.

Again, none of these proves anything by itself.

We are just trying to ask a better question than:

Why are they being so difficult?

Same “no”. Different problem.

Imagine you tell three children:

“Put your shoes on.”

All three say:

“No.”

Child one knows how, is perfectly capable in that moment, and is hoping if they argue long enough you will put the shoes on for them.

That may be won’t.

Child two struggles with the laces, gets stuck organising the steps and genuinely cannot do the whole task independently yet.

That may be can’t.

Child three puts their shoes on every day, but today they are tired, already upset and running ten minutes late. Suddenly something they normally manage has become much harder.

That may be can’t right now.

Same word.

Same behaviour.

Different problem underneath it.

And if the problem is different, our response probably should be too.

Try this before you react

The next time your child refuses something you know they have done before, pause for a second.

Ask yourself:

Won’t?

Can’t?

Can’t right now?

You do not need to get it perfect.

You are just stopping yourself from assuming refusal automatically means defiance.

Maybe the answer is won’t.

Good. Hold the boundary.

Maybe the answer is can’t.

Then we need to teach or support the missing skill.

Maybe it is can’t right now.

Then we may need to help the child access a skill that normally exists but is harder to reach under the current load.

That is the whole point of the framework.

Not to excuse behaviour.

To respond to the problem that is actually there.

Because when a child says “no”, we know what happened.

We still don’t necessarily know why.

Behaviour is the output.

The next job is working out what produced it.

Read next

Behaviour Is the Output

Why the thing we can see is not always the best place to start.

The teacher says they had a good day. They did the work. Followed instructions. No major problems.

Then they get home.

Someone asks them to put their bag away and they lose it. Their sibling says something annoying. There are no crackers left. Mum asks a normal question and suddenly we have shouting, crying, hitting, doors slamming, or a child telling everyone to leave them alone.

The parent is left thinking:

How can you hold it together for six hours at school and then completely fall apart over a school bag?

Read more

Put your shoes on.

Brush your teeth.

Stop hitting your brother.

Turn the screen off.

Get in the car.

Come and eat.

Go to bed.

Things that seem like they should be simple somehow become enormous.

And after enough of those days, it is very easy to start wondering:

Why is my kid like this?

Lots of things cross our minds.

Are they lazy? Defiant? Maybe they just don’t care?

Or maybe it’s us.

Maybe we’ve been too soft. Too strict. Everyone else seems to have it figured out.

It’s all valid. We’ve all been there.

But bad behaviour isn’t a personality trait.

Often, there’s something in the picture we’re missing.

When I see behaviour that is intense, confusing or inconsistent, I tend to wonder about three things.

What are the inputs a child is managing?

Is the environment noisy, unpredictable, overwhelming, uncomfortable, or simply demanding more of them than we realise?

What is the situation asking them to do?

Maybe they need to wait, shift plans, find words, remember several steps, control an impulse, tolerate frustration, or understand something they haven’t fully learnt yet.

And then:

Are they regulated enough to actually access that ability right now?

A child may have a skill and still struggle to use it when they are tired, hungry, stressed, overloaded, or already running out of capacity.

That is why a child can cope beautifully one day and completely fall apart the next.

The skill may not have disappeared.

Something around it changed.

That does not mean behaviour does not matter

Kids still need boundaries.

They still learn what works.

Sometimes they really are avoiding something they do not want to do.

Understanding what sits underneath behaviour does not mean accepting hitting, screaming, or disrespect.

It just means I do not want to decide what the behaviour means too quickly.

Because the response to an overwhelmed child should look different from the response to a child who is missing a skill.

And both should look different from the response to a child who has learnt that arguing gets the demand removed.

Same behaviour as the outcome.

Completely different problems underneath it.

You do not have to work it all out in the moment

This is the part where I see parents get stuck.

You do not need to diagnose every meltdown.

You do not need to understand exactly why your child is refusing while you are standing in the hallway already ten minutes late.

Sometimes the first step is simply noticing:

Something about this is harder for them than it looks.

Then later, when everybody has settled, you can ask:

What was coming in?

What was being asked of them?

Was there a skill missing?

Or was a skill they normally have suddenly much harder to access?

That gives us a much better place to start than:

What is wrong with my kid?

Because you do not have a bad kid.

You have a child whose behaviour is giving you information.

Our job is not to judge the output too quickly.

It is to work out what might be sitting underneath it.

Behaviour is the output. We should understand the system behind it.

Read next

Won’t, Can’t, or Can’t Right Now?

Because those three things can look almost identical from across the room, but they need very different responses.

You know they know.

They did it yesterday. They did it this morning. If you asked them what they were supposed to do with their shoes, they could probably tell you.

And yet at 4:17 on a Wednesday afternoon, you ask them to put the shoes away and everything falls apart.

They refuse.

You ask again.

Their voice gets louder.

You remind them they know how.

Now you’re arguing about listening, or respect, or attitude.

Five minutes later somebody is shouting, the shoes are still exactly where they started, and everyone is wondering how something so small became such a big deal.

This is the point where we usually focus on the thing we can see.

The refusal.

The shouting.

The ignoring.

And that makes sense. Behaviour is the obvious bit.

But I think this is also where we get ourselves into trouble.

The behaviour is where we noticed the problem. It isn’t necessarily where the problem started.

We are very good at describing what children do

Defiant.

Impulsive.

Avoidant.

Disrespectful.

Attention-seeking.

Dysregulated.

Sometimes those words are useful. Sometimes they describe something real.

But they are still descriptions.

If I tell you a ten-year-old refused to do their homework, you know what happened.

You still don’t know why.

That distinction matters to me.

Because I see parents get stuck here all the time.

A child refuses, so we try to fix refusal.

A child hits, so we try to stop hitting.

A child won’t get ready for school, so the problem becomes getting them through the door.

And sometimes that is exactly where we need to work.

But sometimes it isn’t.

Maybe the homework is beyond the child’s current skill.

Maybe they can do it, but today they are absolutely cooked.

Maybe the room is noisy enough that concentrating is taking far more effort than anyone realizes.

Maybe starting the task requires planning, organizing and holding several pieces of information in mind, and that system is running badly by the end of the day.

Or maybe arguing has worked before. Maybe “no” is simply a very effective way of making the demand disappear.

Same behaviour.

Different problem.

That is why I keep coming back to this idea:

Behaviour is the output.

The interesting question is what produced it.

Three children. Same “No.”

Imagine three ten-year-olds at the kitchen table.

All three are asked to do twenty minutes of homework.

All three say:

“No.”

From across the room, they look pretty similar.

But look closer.

The first child understands the work. They can do it. They are not especially overwhelmed. But over time they have learned that if they push hard enough, argue long enough or make enough noise, the homework sometimes goes away.

That matters.

The second child wants to get the work done.

But the maths depends on a skill they never properly mastered. Every worksheet exposes the same problem. Every worksheet is another chance to fail in front of somebody.

Their “no” is arriving before that happens.

Then there is child three.

They did almost exactly the same maths yesterday.

No problem.

But today they have had a noisy classroom, a playground argument, a teacher away sick, an unexpected timetable change and seven hours of keeping themselves together.

By 5pm the maths has not suddenly changed.

The child trying to do the maths has.

Same “no”.

Completely different place to start.

And this is exactly why I don’t want to decide what a behaviour means from across the room.

“But I know they can do it”

Parents say this to me a lot.

“I know he can do it.”

And often they are completely right.

They have seen the skill.

But this is the bit I think we miss:

having a skill and being able to access that skill reliably are not the same thing.

You already know this from your own life.

You know how to communicate respectfully.

You know snapping at someone usually makes a difficult situation worse.

You know how to think before reacting.

But give yourself four hours of sleep, too much noise, six things happening at once and one more demand at exactly the wrong moment.

You probably don’t perform exactly the same.

Your knowledge hasn’t disappeared.

But access to your best thinking can change.

Children are no different in that basic respect.

Research broadly supports this idea. Children’s attention, working memory and other executive abilities can be affected by stress, emotional context and what is happening around them.

But I want to be careful here.

That does not mean stress explains every behaviour.

And it does not mean every child falls apart cognitively whenever they are stressed.

The effects differ between children, between situations and between skills.

That is actually the useful part.

Human performance is variable.

So when somebody tells me:

“But he knows how.”

I don’t think the conversation is finished.

I want to know:

Could he access it then?

This doesn’t mean everything is “the nervous system”

I want to make this clear early because I think the phrase gets overused.

Sometimes a child is avoiding something because avoidance works.

Sometimes a behaviour has been reinforced.

Sometimes a boundary is needed.

Sometimes a child simply does not want to do the thing you are asking them to do.

Not every behaviour needs a complicated neurological explanation.

I am not interested in turning “the nervous system” into a magic phrase that explains everything.

I am interested in mechanism.

What was happening?

What was being asked of the child?

What skills did the situation require?

What changed?

What was the behaviour doing for them?

Where was the pressure coming from?

That is a very different question from simply saying:

“They’re dysregulated.”

That word might be useful.

But it still doesn’t tell me enough.

So what does “Behaviour Is the Output” actually mean?

It means I don’t want the investigation to stop with what I can see.

Especially when behaviour is persistent, intense, confusing or highly variable.

If a child can manage something some days but not others, I get curious.

If a strategy should work but repeatedly doesn’t, I get curious.

If the behaviour only happens in one environment, at one time of day, or around one particular demand, I get curious.

Not because every pattern has some hidden diagnosis waiting underneath it.

Because patterns give us information.

Over time, Why We’re Lost is going to go much further into this.

We’ll look at what is coming into the system, what skills a child actually has, what development sits underneath those skills, and how reliably those skills stay available when the load goes up.

But I don’t think you need all of that today.

For now, I’d make one change.

Instead of immediately asking:

How do I stop this behaviour?

try asking:

What might this behaviour be telling me?

That question alone changes where you look.

Three things I’d become curious about

If something your child is doing just doesn’t make sense, I’d start here.

What changed?

Does the behaviour happen all the time?

Or mostly after school?

Around homework?

When they are hungry?

When plans change?

When there are lots of people around?

When they are tired?

When one specific person asks?

I care about the times the behaviour doesn’t happen almost as much as the times it does.

Because variability tells us something.

What did the situation actually require?

Sometimes we describe the expectation as though it is one skill.

“Just get ready.”

“Just tell me what happened.”

“Just stop hitting.”

But “just get ready” might require remembering five steps, shifting away from something enjoyable, managing time, finding missing objects and coping with somebody hurrying you.

That is not one skill.

And “use your words” is not particularly helpful if words are the thing disappearing when the pressure goes up.

What is the behaviour doing?

Is it buying time?

Getting help?

Escaping a difficult task?

Creating distance?

Communicating something the child cannot say another way?

Again, none of those things can be decided from the behaviour alone.

That is the point.

Back to the shoes

The shoes still need putting away.

Understanding behaviour does not mean abandoning expectations.

It does not mean there are no consequences.

It does not mean your child gets to hit someone because they were overwhelmed.

The shoes can still need putting away.

The boundary can still exist.

I just don’t want the thinking to end with:

“They know better.”

Maybe this really is a straightforward boundary and learning issue.

Maybe it is a skill problem.

Maybe today is different from yesterday for a reason we haven’t understood yet.

I don’t know from the shoes alone.

And neither do you.

But once we stop treating the behaviour as the whole explanation, we at least know where to start looking.

That is what I want this publication to do.

Not give you a new label for every difficult moment.

Not convince you that everything is a nervous-system problem.

Just help you become better at asking:

What am I actually looking at here?

Because behaviour tells us something happened.

Our job is to work out what.

Behaviour is the output.

Understand the system behind it.

What behaviour in your child makes the least sense to you?

Leave it in the comments. I’ll use the questions parents send me to shape future Why We’re Lost articles.

Next

There is an obvious problem that follows from all of this.

A child who won’t do something, a child who can’t do it, and a child who usually can but cannot reliably access the skill right now can look almost identical from across the room.

They aren’t the same problem.

That is where we’ll go next:

Won’t, Can’t, or Can’t Right Now?

Research note: The research discussed above includes experimental studies looking at how stress and emotional context can influence children’s attention, working memory and executive function. The point I’m drawing from that literature is deliberately broad: children’s performance can change with state and context, and those effects are not identical across children or across skills.

Selected sources: Roos et al. (2020), Developmental Psychobiology, 62(4), 532–543. Tsai et al. (2021), Journal of Experimental Child Psychology, 209, 105176. Deer et al. (2026), Journal of Experimental Child Psychology, 265, 106445.