ADHD and Time Perception: How Brain Stimulation Can Help

Can Brain Stimulation Help Children with ADHD Perceive Time?

Have you ever noticed how time seems to pass differently for some children with ADHD? Sometimes, five minutes feel like an eternity, or an hour flies by without them even realizing. It’s not just an impression: their brains really do process time in a unique way. A study published in 2024 in Scientific Reports tested a technique called transcranial direct current stimulation (tDCS) on 26 children with ADHD and found that it may help adjust this perception. Let’s talk about this in simple terms, like I’m explaining it to you over a cup of coffee.

Also read: Decisions in ADHD Treatment: How to Involve the Whole Family

Why is time a challenge for those with ADHD?

Children with ADHD often struggle to “feel” time. This can mean thinking something took much longer than it really did, or being unable to plan the day because the future seems blurry. In the study, researchers explain that this happens because areas of the brain, like the ventromedial prefrontal cortex (vmPFC) and the dorsolateral prefrontal cortex (dlPFC), don’t work as expected. These areas help control attention, impulses, and, of course, time perception.

Think of it like this: it’s as if their internal clock runs faster or slower depending on the moment. This messes with simple things, like waiting their turn during a game or completing a task on time. The study showed that they have problems in three main areas:

• Discriminating time: Comparing how long two things last.
• Estimating time: Guessing how much time something took.
• Reproducing time: Repeating a duration they just saw or heard.

What is this brain stimulation?

tDCS, or transcranial direct current stimulation, is a technique that uses a very weak electrical current to “wake up” or “calm down” specific parts of the brain. It’s non-invasive — more like a device with electrodes placed on the head, kind of like a weird cap. In the study, researchers tested it on children with ADHD between 6 and 12 years old in five sessions spaced one week apart.

They focused on two areas of the brain: the left side of the dlPFC (which helps organize and focus) and the right side of the vmPFC (which handles emotions and rewards). They used different combinations of stimulation, like turning one area on while turning the other off, or stimulating just one of them, plus a “sham” session for comparison.

Also read: How the Neural Instability of ADHD Affects Cognitive Control

What happened in the study?

The results were promising! In time discrimination tasks — like deciding which sound or image lasted longer — the children improved in all the real stimulation sessions compared to the sham session. It didn’t really matter which combination of electrodes they used; simply stimulating those areas made a difference.

In the time estimation and reproduction tasks, however, the scenario changed a bit. In this part, the children saw a light turn on for a certain amount of time (as short as 3 seconds or as long as 24 seconds) and then had to say how much time they thought had passed and try to repeat that duration by pressing a button. Here, stimulation of the vmPFC (either alone or with the dlPFC off) and of the dlPFC alone improved time reproduction, but not time estimation. In other words, they were able to repeat the time accurately but still had trouble “guessing” how much time had passed.

Also read: Autism and ADHD: The Role of Executive Functions in Childhood

What does this mean in practice?

Imagine a child who never knows how long it will take to finish homework or who gets impatient waiting for recess. Improving time perception could help with everyday things like:

• Less impulsivity: If time doesn’t feel so “stretched,” they might be able to wait longer before acting impulsively.
• Better planning: Understanding time helps organize tasks and imagine the future.
• Stronger attention: If their internal clock is more aligned, staying focused for longer periods may be less tiring.

I’ve seen this firsthand with a nephew who has ADHD. He would always say, “Is it over already?” after just two minutes of anything. If his brain could “sync up” with real time, maybe he’d be less frustrated.

Is it safe? And does it really work?

The study was done carefully in a controlled environment in Iran, and the parents signed a consent form agreeing to everything. tDCS is considered safe when used by professionals, but it’s still in the research phase — it’s not something you’ll find at every clinic. Scientists also warn that the effects may vary from child to child, and the study was small, with only 26 participants. So, it’s a promising first step, but more testing is needed.

What should you do now?

For now, tDCS isn’t something you can find in your home or your child’s school, but this study opens up possibilities. If you have a child with ADHD who often seems “lost in time,” it’s worth talking to a doctor or psychologist about strategies. While science moves forward, simple things like using timers, breaking tasks into smaller chunks, or playing games that involve waiting for a turn can help train time perception.

Also read: What is the Role of Metabolism in ADHD?

A Final Word

Time can be either a friend or a foe for those with ADHD, but studies like this show that it’s possible to adjust that internal clock. It’s not magic, but it’s hope. Whether it’s helping with tasks or bringing more calm to the day, understanding how the brain works is the first step in making life flow better.

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Jeferson Manini

I am Jeferson Magno Amorim Manini, a Psychology undergraduate student with a passion for neuroscience, research, and knowledge. My academic and professional journey has led me to deeply explore Attention Deficit Hyperactivity Disorder (ADHD), not only as a topic of study but as a reality that impacts millions of people.
It was from this passion that TDAH.World was born – a space created to inform, support, and connect people with ADHD. My goal is to translate complex information into accessible content, without losing scientific depth, so that more people can better understand and deal with the challenges – and also the potential – of ADHD.
I believe that well-applied knowledge can transform lives, and that’s what motivates me to keep studying, writing, and sharing insights on neuroscience, mental health, and cognitive performance. If you’ve made it this far, I hope you find something here that makes sense to you!