ADHD or Age-Appropriate Activity in a Child: How to Tell
Not every active child has ADHD and not every child with ADHD looks active. Which criteria separate the two, being youngest in class, and diagnosis worries.
"My child is very active, could it be ADHD?" is a natural question for families. The counter-question is just as natural: "Does every active child get an ADHD diagnosis?"
Both have something right in them. This article explains how the distinction is made, why it is hard, and why the worry about overdiagnosis and the worry about underdiagnosis are both real at the same time. For the diagnostic process itself there is the article on how ADHD is diagnosed in children.
Activity alone is not enough
According to the DSM-5, a diagnosis requires the following as well as a number of symptoms:
- Symptoms that are not appropriate to the developmental level: clearly in excess compared with peers.
- Symptoms that began before the age of 12.
- Presence in at least two settings (home, school, time with relatives).
- A real impairment in social, school or daily functioning.
- Not being better explained by another condition.
A child can be very active in class but calm at home; can cause no trouble at school but have outbursts at home; or can have symptoms in both settings without functioning being disrupted. Each of these situations calls for a different evaluation.
You will not find the inattentive type with a criterion of activity
The picture also tells us this: some children with ADHD never look active. In the predominantly inattentive type, the child quietly looks out of the window, does not hear what is asked, loses belongings. The article on ADHD in girls describes this quiet picture separately. So the conclusion "not very active, therefore no ADHD" is also wrong.
Being the youngest in the class
In the same class, there can be a gap of up to eleven months between birth dates. The difference in maturity between a six-year-old and a seven-year-old is large.
Elder's study based on birth dates and the systematic review by Holland and Sayal showed that the youngest children in a class are more likely than their peers to be diagnosed with ADHD and to be started on medication. This suggests that a difference in developmental maturity can sometimes be read as a symptom of ADHD.
This finding does not mean "ADHD is made up." It says this: in diagnosis, the child needs to be assessed against their own age rather than against their classmates, and the maturity difference needs to be taken into account. If a young child (especially at the start of school) has symptoms, the doctor should keep this effect in mind.
Overdiagnosis or underdiagnosis
The worldwide review by Polanczyk and colleagues estimated the prevalence of ADHD in children and adolescents at around five percent. The Lancet Psychiatry review by Sayal and colleagues emphasizes that the problems of underdiagnosis and overdiagnosis can exist side by side: some children are diagnosed later than they should be, or never (especially girls and the inattentive type), while others are diagnosed on the basis of borderline symptoms.
So it is possible, and sensible, to carry both worries together:
- "Let them not be labeled more than necessary."
- "Let a child who needs support not go unnoticed."
These two worries are not opposites; both are right, and both show why a good-quality evaluation is necessary.
What is looked at in the distinction
Questions that are useful for the doctor and the family:
- Since when have the symptoms been there, when did they begin? Are they new, or have they been there for years?
- In which settings are they present, and in which are they absent? Even during an activity that holds the child's interest?
- Is the child clearly different among classmates and peers? Or is the whole class active?
- Is there another cause such as sleep, nutrition, anxiety, hearing or vision?
- Has there been a major change at home or at school recently?
- How much does it disrupt functioning: grades, friendships, home routine?
- Is there a history of ADHD or something similar in the family?
Waiting can be an option
In a borderline picture, instead of making a diagnosis right away, the doctor may have recommended monitoring for a while and observation-based support. This is not "not taking it seriously"; it is a way to make the diagnosis more solid. The adjustments that can be made at home and at school during this period help the child anyway. The article on ADHD in the preschool years gives an example of this wait-and-support approach.
What the family can do
- Think about the child's age and their relative age within the class.
- Give the doctor concrete examples about functioning, not just "activity."
- Make a joint observation with the teacher. The article on talking to the teacher describes the preparation.
- If a diagnosis is made, see it not as something that defines the child but as a way of finding support for them.
This article is for information; the decision for your child belongs to the doctor who evaluates them.
Frequently asked questions
- Is an active child a child with ADHD?
- No, most of the time not. Activity alone does not establish a diagnosis. What is looked for is symptoms that are clearly excessive for the age, seen in more than one setting, together with a loss of functioning.
- How does being the youngest in the class affect the diagnosis?
- Compared with classmates who are months older, the younger child can look more inattentive and more active. In studies, the youngest children in a class were found to be more likely to be diagnosed with ADHD.
- Is ADHD overdiagnosed?
- Research shows that both overdiagnosis and underdiagnosis can be seen. Some children are diagnosed more than is warranted, and some (especially girls and the inattentive type) are diagnosed later than they should be.
- Is there a single test to tell them apart?
- No. The distinction is made through a clinical interview, the developmental history, information from school and rating scales. If needed, the course of the symptoms over time is assessed through follow-up.