The presentation that gets missed belongs to the child who is no trouble at all. She is quiet in class, she is polite, and she is somewhere else entirely. The Royal College of Psychiatrists notes that inattentive difficulties are less obvious than hyperactivity and are often overlooked as a result, and that is exactly what happens in practice.
This is inattentive ADHD, and it is what people used to call ADD. The term was retired years ago, but the presentation it described is still recognised, and it is now understood as one of three presentations within ADHD. Our page on ADHD symptoms covers all three.
What Inattentive ADHD Is
ADHD affects how the brain manages attention, activity and impulse. In the inattentive presentation, the difficulty sits almost entirely in the first of those.
It is worth being precise about what that means, because the name is misleading. These children are not short of attention. They have too little control over where it goes. A child who cannot follow ten minutes of a lesson may spend three hours absorbed in something that interests her, and adults draw the obvious conclusion, which is the wrong one. If she can concentrate on that, she could concentrate on this if she wanted to. Attention that works beautifully when interest is high and collapses when it is not is characteristic of ADHD rather than evidence against it.
The diagnostic criteria require the difficulties to have been present before the age of twelve, to show up in more than one setting, and to cause real problems. Occasional daydreaming in a boring lesson is not ADHD.
Signs of Inattentive ADHD in Children
At home, the clearest sign is usually the gap between what a child is asked to do and what actually happens. She goes upstairs to fetch her shoes and is found ten minutes later reading. He is told three things and does the last one. Nothing about this is defiance, which is why the usual consequences make no difference.
Homework takes far longer than it should, and much of that time is not spent working. Starting is hard and returning after any interruption is harder. Belongings go missing at a rate that becomes a family joke. Long instructions, long readings and anything with several steps all tend to fall apart in the middle.
The social side is quieter but it is there. Conversations get lost halfway through, so replies arrive late or answer the wrong question. In a group of children talking quickly, a child who needs a moment longer to catch up often ends up on the edge of it. This rarely looks like a social difficulty. It looks like shyness.
Careless errors are common in work the child clearly understands, and so is the frustration that follows, because these children usually know they can do better and cannot work out why they did not.
Why Inattentive ADHD Is Missed at School
Schools notice what interrupts a lesson. A child who drifts quietly interrupts nothing, so nothing is raised, and the difficulty is recorded in language that sounds like character rather than symptom.
Away with the fairies. Could do better. Lacks focus. Does not apply himself. Careless. Needs to try harder. Each of these describes something real, and each of them attributes it to effort. A child who hears that description for long enough usually starts to believe it.
Ability makes it worse rather than better. A bright child with inattentive ADHD can coast for years on what she absorbs without trying, and the gap only opens up when the work gets harder and organisation starts to matter. That is why so many are identified at the transition to secondary school, or later still around exams.
There is a practical consequence to all of this. Schools generally raise a concern before a referral happens, so a child whose difficulties never trigger a concern can go the whole of primary school without anyone suggesting an assessment. In those cases it is almost always a parent who starts the process.
Inattentive ADHD, Girls and Anxiety
Girls are more likely than boys to have the inattentive presentation, and they are diagnosed later as a result.
Compensation is part of the reason. Lists, colour coding, elaborate systems, staying up late to finish work that should have taken an hour. From the outside this looks like a conscientious child managing well. The effort behind it is invisible until it stops working.
Anxiety often arrives alongside. Living with a brain that loses track of things produces a lot of low grade worry about forgetting, being late and being found out. The anxiety is visible and the ADHD is not, so the anxiety is what gets treated. Where anxiety has been addressed and the difficulties remain, it is reasonable to ask whether something underneath it has been missed.
What Else Can Look Like This
Inattention on its own is not diagnostic. Poor sleep produces it in any child. So can undetected hearing or vision difficulties, low mood, a difficult period at home, or an undiagnosed specific learning difficulty such as dyslexia, where avoidance of the work can look like drifting away from it.
Autism can also present with what appears to be inattention, and it frequently occurs alongside ADHD. A proper assessment considers these alternatives before reaching a conclusion, which is something a questionnaire cannot do.
When to Seek an Assessment
It is reasonable to seek an ADHD assessment for your child when the difficulties have lasted at least six months, appear at home and at school, and are affecting learning, friendships or confidence. You do not need to wait for the school to raise it, and you do not need a GP referral.
Bring what you have. A few dated notes of what you see, school reports going back a few years, and anything similar in the family are all useful. Reports that mention concentration or organisation are particularly worth digging out.
ADHD Health Clinic: Assessing ADHD in Children
We assess ADHD in children and young people aged 6 to 17, online across the UK or in person at our Marylebone clinic. Our child team includes consultant child and adolescent psychiatrists, chartered psychologists and specialist practitioners, and the clinicians involved are matched to the assessment chosen.
We are CQC registered. We follow NICE guidance. Appointments are usually available within one to two weeks and the report is normally with you within ten days. The report can be used to support requests for help at school. If appropriate, we can also discuss treatment. Our fees are published in full, and you are welcome to contact us if you would like to talk it through first.
