Science Minded

Science Minded

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Dr Siobhan Kennedy-Costantini

"Sharing the science of childhood with the adults who shape it"

📚Professional learning and development

13/06/2026

One of the biggest mistakes we make with young children is assuming that because they can talk, they should be able to consistently act on what we say.

A four-year-old has only been using sophisticated language for a couple of years.

A five-year-old? Not much longer.

Yet we often expect them to hear an instruction, stop what they're doing, shift their attention, remember the request, organise their body and follow through immediately.

That's actually quite a complicated task.

What makes this even harder is that children don't learn primarily through explanations.

They learn through relationships, observation, imitation and experience.

Think about how children learn to talk in the first place. We don't sit them down and teach them grammar rules. They learn by listening to the people around them, watching what they do and joining in.

Behaviour develops in much the same way.

This is why children can often tell you the rule but still struggle to follow it.

Knowing what to do and being able to do it are two very different things.

So when we find ourselves repeating:

"Put your shoes on."

"Pack away the toys."

"Come to the table."

over and over again, it can be worth asking a different question.

Have I only told them what to do?

Or have I shown them?

Children are apprentices in being human.

They are constantly watching how we speak, move, respond to frustration, solve problems and treat other people.

Our modelling is often far more powerful than our explanations.

This doesn't mean children don't need boundaries or expectations. They absolutely do.

But sometimes the most effective way to teach a behaviour is not another reminder.

It's showing them what it looks like.

Because young children often learn more from what we consistently do than from what we repeatedly say.

Comment below - What's something you've caught your child copying from you recently?



References: Bandura (1977); Diamond (2013)

Photos from Science Minded's post 23/04/2026

Something happens in our brain when our child melts down.

We want to fix it. Fast. So we say the first thing that comes out. And often, that first thing, however well-intentioned, makes everything harder.

I've done it. Most of us have. And it doesn't mean we're doing it wrong, it means we're human, and our own nervous systems are responding right alongside our child's. When someone we love is distressed, our brain registers it as a threat. We move to action. We want the distress gone, for them and if we're honest, for us too.
That's not a character flaw. That's biology.

But it's worth knowing which phrases tend to backfire, because once you can see them, you can start to catch them.

❌ "Calm down."
Telling a flooded child to calm down is like telling someone drowning to swim better. They would if they could. A dysregulated nervous system cannot follow verbal instructions, it needs a regulated nervous system nearby to co-regulate with.
Try: "Let's slow down your breathing, then we can talk."

❌ "Just breathe."
Same problem, different packaging. Telling a flooded child to breathe is like handing that same drowning person a map. They need co-regulation first, not instructions.
Try: Modelling slow, exaggerated breaths yourself. Their nervous system will often follow yours, even when words can't reach them.

❌ "You're fine."
This one dismisses before it connects. Even when we mean it kindly, even when it's technically true, it communicates something the child hears loud and clear: your experience isn't real. And that lands hard.
Try: "This feels hard. I'm here."

❌ "There's nothing to be scared of."
Fear doesn't respond to logic. Not in children, not in adults. You can't think your way out of a felt sense of threat, and neither can they.
Try: "This feels scary for you. I'll keep you safe."

❌ "It's not a big deal."
It is a big deal. To them, right now, it is the biggest deal. Minimising it doesn't shrink the feeling, it just quietly teaches them not to trust you with the next one.
Try: "This really matters for you. I get it."

And then, if you can, try to imagine it from their perspective. Not who's right and who's wrong. Simply what feels real for them in that moment. That shift alone can change everything about how you respond.

The goal in a flooded moment isn't compliance. It's safety. Once they feel safe, everything else becomes possible.

I'm curious about your experience with this. Which of these phrases is hardest for you to resist in the moment? And is there one that surprised you, that you hadn't thought of as dismissive before? I'd genuinely love to hear from you in the comments.

Carollo et al. (2023); Siegel & Payne Bryson (2012); Porges (2011)

20/04/2026

The relationship we have with our children doesn’t just shape their behaviour.

It quite literally shapes their brain.

And I don’t mean that metaphorically.

From the very beginning, our children’s brains are developing in the context of relationship. The repeated, everyday interactions we have with them become the architecture their brain is built on. The way we respond when they’re overwhelmed, the way we repair after a hard moment, the way we stay close even when behaviour is big or confusing… all of this is doing something.

It’s wiring their brain.

It’s building the systems that help them regulate emotions, manage stress, feel safe in relationships, and eventually think, learn and problem-solve.

And here’s the part I think many of us need to hear.

It’s not about getting it right all the time.

It’s not about never losing patience, never feeling frustrated, or always knowing exactly what to do.

The brain isn’t built through perfection.

It’s built through patterns.

Through enough moments of being responded to.
Through enough experiences of feeling safe.
Through enough repairs after things go wrong.

That’s what shapes development.

Not the one moment we wish we could take back.
But the hundreds of moments where we show up again.

When our children are dysregulated, their nervous system is leading. In those moments, they’re not accessing logic or reasoning in the way we might hope. They need us to help bring their system back to a place of safety first.

That’s what co-regulation is.

And over time, those repeated experiences of being supported in that way become the foundation for their own ability to regulate.

This is why connection isn’t separate from “discipline” or “behaviour support.”

It is the foundation of it.

So I’m really curious to hear from you.

What feels hardest about staying connected in those moments?
When your child is pushing back, melting down, or not listening… what’s the part that challenges you the most?

And on the flip side, have you ever noticed a moment where staying connected actually changed how things played out?

Let’s talk about it 👇

Photos from Science Minded's post 16/04/2026

Goodness of fit is a simple but powerful idea from child development.

It’s about how well a child’s natural temperament (how they’re wired) matches with what the environment expects from them, and how the adults around them respond.

Not all children experience the world the same way. Some are more sensitive, some are more active, some take longer to warm up, some adapt quickly. None of these traits are “good” or “bad” on their own. They just are.

Where things get easier or harder is in the fit.

A good fit looks like:

❤️an adult noticing who a child is and adjusting expectations
❤️a slower-to-warm child being given time instead of rushed
❤️a highly active child having space to move rather than being expected to sit still for long periods
❤️a sensitive child being supported gently through big feelings, not pushed to “toughen up”

A poor fit looks like:

đź’”expecting all children to behave the same way
đź’”seeing temperament as a problem instead of a difference
💔lots of power struggles, overwhelm, or repeated “challenging behaviour”

When the fit is good, children feel understood. Their nervous system settles more easily. Behaviour improves, not because we’ve controlled it, but because we’ve reduced the mismatch.

And importantly, goodness of fit doesn’t mean letting go of boundaries.

It means holding the boundary and adjusting how we support the child to meet it.

So instead of:
“Why is this child so difficult?”

We shift to:
“What does this child need from me so they can succeed here?”

That shift is where so much change happens.

References: Thomas & Chess (1977); Thomas, Chess & Birch (1968);
Rothbart & Derryberry (1981); Rothbart (2011); Woodhouse, Scott, Hepworth & Cassidy (2020)

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