Why Your Child Talks to Themselves (and Why You Should Let Them)
That running commentary your four-year-old keeps up while doing a jigsaw puzzle is not babbling. It is their brain learning to think. Research shows 78 per cent of children perform better on tasks when they talk themselves through it - and telling them to be quiet might be the worst thing we can do.
You are sitting in the next room and you hear your four-year-old narrating their way through a jigsaw puzzle. "This one goes here... no, not that one... the blue one... turn it round... yes." Nobody is with them. They are talking entirely to themselves. It sounds funny. It might even sound a little odd. But what they are doing is one of the most important things their brain will learn this decade.
Psychologists call it private speech - the out-loud self-talk that children produce when they are playing, building, drawing or working through a problem. It is incredibly common. Most children between the ages of two and seven do it regularly, and at its peak - around age four to six - it can make up between 20 and 60 per cent of everything a child says.
For a long time, people assumed it was meaningless. Jean Piaget, one of the most influential child psychologists of the twentieth century, called it "egocentric speech" and thought it was a sign of immature thinking that children would simply grow out of. But another psychologist, Lev Vygotsky, disagreed. He argued that children were not babbling pointlessly. They were thinking out loud. And decades of research since has shown he was right.
A study at George Mason University found that 78 per cent of five-year-olds performed the same or better on tasks when they talked to themselves, compared to when they stayed silent. That is a striking number. It means the self-talk is not a distraction - it is the tool they are using to get the job done.
This makes sense if you watch it in action. A child building a tower does not just say random things. They say "the big one goes at the bottom" or "careful, careful" or "I need the red one next." They are giving themselves instructions. And when the task gets harder, they do it more. Researchers have consistently found that private speech increases when children hit obstacles - exactly as Vygotsky predicted. The harder the problem, the more they talk.
What is really happening is the early construction of executive function - the set of mental skills that let us pay attention, hold information in mind and resist impulses. These skills are among the strongest predictors of how well children do at school, stronger even than IQ in some studies. And private speech appears to be one of the ways children build them.
Around age six or seven, you start to notice the shift. The full sentences become muttering. The muttering becomes whispering. The whispering becomes lip movements with no sound. And eventually, it becomes the silent inner voice that adults use to think, plan and talk themselves through difficult moments. That voice in your head reminding you to check the shopping list or telling you to stay calm in a meeting - it started as your four-year-old self chattering away over a pile of building blocks.
This progression - from out loud to whispered to silent - is one of the most well-documented patterns in developmental psychology. It is not a sign that children stop needing the words. It is a sign that their brains have learnt to run the same process internally. The scaffolding becomes invisible, but it does not go away.
And adults who still talk to themselves out loud? About 25 per cent of us do it regularly. Research suggests it is not a quirk - it actually helps. Studies have found that reading instructions aloud before doing a task leads to better concentration and performance than reading them silently. Speaking a thought out loud forces you to complete it properly, to give it shape and structure, in a way that silent thinking sometimes does not.
That does not mean classrooms should be chaotic. But it does mean that a child who talks their way through a worksheet is not being disruptive. They are doing exactly what their brain needs them to do at that stage of development. Adam Winsler, a psychologist at George Mason University who has spent decades studying this, has been clear on the point: children should be allowed to talk to themselves during challenging work.
There is also a more specific finding worth knowing about. A study of 212 children aged nine to thirteen in the Netherlands looked at what happened when children used self-talk during maths tests. The children who used effort-focused self-talk - saying things like "I will do my very best" - performed better than those who stayed silent. The effect was strongest for children who had low confidence in their own ability. For those children, the self-talk prevented the drop in performance that normally occurred.
What did not work was ability-focused self-talk - saying things like "I am very good at this." The pep talk about being clever made no difference. The pep talk about trying hard did.
If your child talks to themselves while drawing, building, doing homework or getting dressed, let them. If they narrate their way through tying their shoes or packing their school bag, that running commentary is helping them remember the steps and stay focused. It is not a sign they need help. It is a sign they are helping themselves.
You can also model it. Thinking out loud in front of your child - saying things like "Right, I need to find my keys, so let me think about where I put them" - shows them that self-talk is a normal, useful thing that grown-ups do too.
And if your child is struggling with something and going quiet, gently encouraging them to talk through what they are doing can sometimes unstick them. Not by telling them the answer, but by prompting them to put the problem into words. "What are you trying to do?" or "What have you tried so far?" can be enough.
The muttering, the narrating, the whispered instructions to no one - it all sounds like noise. But it is the sound of a brain learning to think.
Psychologists call it private speech - the out-loud self-talk that children produce when they are playing, building, drawing or working through a problem. It is incredibly common. Most children between the ages of two and seven do it regularly, and at its peak - around age four to six - it can make up between 20 and 60 per cent of everything a child says.
For a long time, people assumed it was meaningless. Jean Piaget, one of the most influential child psychologists of the twentieth century, called it "egocentric speech" and thought it was a sign of immature thinking that children would simply grow out of. But another psychologist, Lev Vygotsky, disagreed. He argued that children were not babbling pointlessly. They were thinking out loud. And decades of research since has shown he was right.
A Remote Control Made of Words
When a child talks themselves through a task, they are doing something their brain cannot yet do silently. They are planning, sequencing, correcting mistakes and keeping themselves on track. The words act as a kind of remote control for their own behaviour.A study at George Mason University found that 78 per cent of five-year-olds performed the same or better on tasks when they talked to themselves, compared to when they stayed silent. That is a striking number. It means the self-talk is not a distraction - it is the tool they are using to get the job done.
This makes sense if you watch it in action. A child building a tower does not just say random things. They say "the big one goes at the bottom" or "careful, careful" or "I need the red one next." They are giving themselves instructions. And when the task gets harder, they do it more. Researchers have consistently found that private speech increases when children hit obstacles - exactly as Vygotsky predicted. The harder the problem, the more they talk.
What is really happening is the early construction of executive function - the set of mental skills that let us pay attention, hold information in mind and resist impulses. These skills are among the strongest predictors of how well children do at school, stronger even than IQ in some studies. And private speech appears to be one of the ways children build them.
From Out Loud to Inside the Head
The interesting thing is what happens next. As children get older, the out-loud talk does not just disappear. It goes underground.Around age six or seven, you start to notice the shift. The full sentences become muttering. The muttering becomes whispering. The whispering becomes lip movements with no sound. And eventually, it becomes the silent inner voice that adults use to think, plan and talk themselves through difficult moments. That voice in your head reminding you to check the shopping list or telling you to stay calm in a meeting - it started as your four-year-old self chattering away over a pile of building blocks.
This progression - from out loud to whispered to silent - is one of the most well-documented patterns in developmental psychology. It is not a sign that children stop needing the words. It is a sign that their brains have learnt to run the same process internally. The scaffolding becomes invisible, but it does not go away.
And adults who still talk to themselves out loud? About 25 per cent of us do it regularly. Research suggests it is not a quirk - it actually helps. Studies have found that reading instructions aloud before doing a task leads to better concentration and performance than reading them silently. Speaking a thought out loud forces you to complete it properly, to give it shape and structure, in a way that silent thinking sometimes does not.
Why "Be Quiet" Might Be the Wrong Thing to Say
This is where the research gets practical. If private speech is a tool children use to regulate their thinking, then asking them to stop doing it - to work quietly, to stop muttering, to "shush" - might actually make the task harder for them.That does not mean classrooms should be chaotic. But it does mean that a child who talks their way through a worksheet is not being disruptive. They are doing exactly what their brain needs them to do at that stage of development. Adam Winsler, a psychologist at George Mason University who has spent decades studying this, has been clear on the point: children should be allowed to talk to themselves during challenging work.
There is also a more specific finding worth knowing about. A study of 212 children aged nine to thirteen in the Netherlands looked at what happened when children used self-talk during maths tests. The children who used effort-focused self-talk - saying things like "I will do my very best" - performed better than those who stayed silent. The effect was strongest for children who had low confidence in their own ability. For those children, the self-talk prevented the drop in performance that normally occurred.
What did not work was ability-focused self-talk - saying things like "I am very good at this." The pep talk about being clever made no difference. The pep talk about trying hard did.
What Parents Can Do (Which Is Mostly Nothing)
The good news is that private speech is something most children do naturally. You do not need to teach it. But you can avoid accidentally suppressing it.If your child talks to themselves while drawing, building, doing homework or getting dressed, let them. If they narrate their way through tying their shoes or packing their school bag, that running commentary is helping them remember the steps and stay focused. It is not a sign they need help. It is a sign they are helping themselves.
You can also model it. Thinking out loud in front of your child - saying things like "Right, I need to find my keys, so let me think about where I put them" - shows them that self-talk is a normal, useful thing that grown-ups do too.
And if your child is struggling with something and going quiet, gently encouraging them to talk through what they are doing can sometimes unstick them. Not by telling them the answer, but by prompting them to put the problem into words. "What are you trying to do?" or "What have you tried so far?" can be enough.
The muttering, the narrating, the whispered instructions to no one - it all sounds like noise. But it is the sound of a brain learning to think.
Sources & Further Reading