When a Child’s Mind Feels Full

Rose Zappariello

3 hours ago

6 min read

When a Child’s Mind Feels Full

How stress, sleep, routines and screens can affect working memory.

Imagine a child sitting at the kitchen table. You have just explained what they need to do:

“First finish your maths questions, then put your book in your bag and get your PE kit ready.”

They nod. Two minutes later: “What am I supposed to do?” You repeat yourself. They start the maths, become distracted, forget what comes next and eventually become frustrated.

It can be tempting to think: “They're not listening.”“They're not trying.”“I've told them this three times!” But sometimes the problem is not willingness. Sometimes, their mind is simply too full. This is where working memory comes in.

What is working memory?

Working memory is a little like a child's mental notepad. It allows us to hold information in our minds for a short period while we use it. When a teacher gives three instructions, when a child reads a sentence and has to remember the beginning while reaching the end, or when they work out a maths problem in their head, they are using working memory. And like a notepad, it has limited space. If too much information is placed on it at once, some of it may simply fall away. This is not necessarily a sign that a child is unable to learn. It may mean that too much is being asked of their cognitive system at that particular moment.

And there are several things that can make that “mental notepad” feel particularly crowded.

When life feels stressful

For a child who has experienced trauma, anxiety, family difficulties, bullying, loss or other significant stress, concentrating on a school task can sometimes be much harder.

Imagine trying to remember a maths instruction while part of your mind is wondering:

“Will things be okay when I get home?” Or: “What if that happens again?”

When we feel unsafe or under significant stress, our brains naturally pay more attention to threat and safety.

Research has found associations between childhood trauma and difficulties in aspects of executive functioning, including working memory. A recent umbrella review of systematic reviews and meta-analyses found particularly consistent evidence concerning working memory and processing speed. This does not mean that trauma permanently damages a child's ability to think or learn. Children are remarkably adaptable. It means that when a child's emotional system is carrying a heavy load, there may be less cognitive space available for learning. Sometimes the most helpful question is therefore not: “Why aren't they concentrating?” but: “What might their mind be busy carrying?”

The tired brain

Now imagine that same child after a very late night. Perhaps they were awake worrying.

Perhaps they were watching videos on a tablet. Perhaps their bedtime has gradually become later and later. The next morning they are forgetful, irritable and unable to follow instructions. Again, it can look like poor attention. But sleep matters enormously for learning, memory and executive functioning.

Research has consistently linked insufficient sleep with difficulties in attention and cognitive functioning in children. More recent research also suggests that sleep loss can impair working-memory processes. Children need sleep not simply because they become tired without it, but because sleep is part of the brain's recovery and learning process. So before we ask a tired child to “try harder”, it is worth asking: Have they had enough opportunity to rest?

The comfort of routine

Children often do well when life feels predictable. Think about your own morning routine.

You probably don't consciously think: “Now I shall walk to the bathroom, then I will brush my teeth, then I will make coffee…” You simply do it. Familiar routines become easier because we don't have to consciously hold every step in our minds. For children, predictable routines can provide the same kind of support. A visual morning checklist, for example, can turn:

“Get ready for school!” into:

☐ Get dressed☐ Have breakfast☐ Brush teeth☐ Pack bag☐ Shoes on

The child no longer has to remember the whole sequence. The environment is doing some of the remembering for them. This can be particularly helpful when a child is anxious, tired or going through a period of change.

And what about screens?

This is probably one of the questions parents ask me most often. And the answer is more nuanced than: “Too much screen time is bad.”

Technology is part of children's lives. Screens can be wonderful tools for learning, creativity, communication and connection. The question is more about how, when and why screens are being used.

Research into screen use and executive functioning is still developing, and findings are mixed. Some studies have found associations between higher levels of screen exposure and aspects of executive functioning, including working memory, while other research highlights the importance of context.

For example, is screen use:

replacing sleep?
happening immediately before bedtime?
interrupting homework?
creating constant switching between activities?
replacing physical activity?
reducing opportunities for conversation and face-to-face interaction?
accompanied by frequent notifications?

Sometimes the problem isn't the screen itself. It is what the screen is displacing.

A child who spends an hour watching a calm educational programme is having a very different experience from a child who spends an hour rapidly switching between highly stimulating videos, messages and games late at night.

So rather than asking only: “How much screen time?” we can also ask: “What is the screen time doing to the child's day?”

What can we do?

The encouraging news is that small changes can make a real difference.

1. Protect sleep

Try to create a predictable bedtime and a calm wind-down period. Where possible, keep stimulating screen use away from bedtime and consider keeping devices outside the bedroom.

2. Take the pressure off working memory

Give instructions in small chunks. Instead of: “Get your book, write the date, answer questions one to five and then put everything away.” try: “Get your book.” Then give the next instruction.

3. Make information visible

Use checklists, pictures, written instructions, visual timetables and reminders. These are not “cheating”. They are tools that support thinking.

4. Create moments of calm

Movement, fresh air, quiet time and opportunities to regulate can help children return to learning with greater readiness.

5. Start with connection

When a child is overwhelmed, more instructions are not always the answer. Sometimes they first need an adult who is calm enough to help them feel safe. Connection can come before correction.

A different way of looking at forgetfulness

The next time a child forgets something you have just said, pause for a moment.

Instead of: “I've already told you!”

perhaps try: “I wonder if their mental notepad is already full.”

What happened last night? Have they slept?

Are they worried? Has something changed?

Are there too many instructions? Are they switching between too many things?

Could we make the task more predictable?

These questions do not remove expectations from children.

They help us understand what they need in order to meet those expectations.

Because sometimes a child doesn't need to try harder.

Sometimes they need less to hold in their head, more predictability around them, and an adult who understands what their behaviour might be communicating.

And that is one of the things I find so valuable about Educational Psychology.

We don't simply ask:

“What is the problem with this child?”

We ask:

“What is happening around this child, and what can we change to help them flourish?”

A final thought

A child's brain is constantly learning, adapting and responding to the world around them.

When that world feels safe, predictable and manageable, there is more room for curiosity, learning and connection. So perhaps, sometimes, the most powerful intervention isn't another reminder to “pay attention.”

Perhaps it is helping the child's mind feel a little less full.