How is ADHD actually diagnosed?
A clinician looks for a pattern that meets agreed criteria. For children, the DSM-5 criteria include:
- At least six symptoms of inattention, or of hyperactivity and impulsivity, or both.
- Symptoms that have lasted at least six months and are more than expected for the child's age.
- Several symptoms present before age 12.
- Symptoms present in two or more settings, such as home and school.
- Clear evidence that they interfere with school, friendships or family life.
- No other condition that better explains them.
To check these, the clinician takes a developmental history, asks parents and teachers to complete rating scales such as the Vanderbilt, and looks for other explanations such as sleep problems, anxiety, learning difficulties, or hearing and vision problems. The American Academy of Pediatrics guideline covers children from age 4.
What can an online ADHD test do?
Most online ADHD tests are rating questionnaires. A good one can help you put what you have noticed into words and decide whether to talk to a doctor. It cannot diagnose, because it hears from one person, at one moment, with no history and no check for other causes. Be cautious of any website that offers a diagnosis from a quiz.
What about computer attention tests?
Some clinics use computer tasks, called continuous performance tests, that measure how quickly and accurately a child responds over several minutes. They can add useful information, but clinical guidelines do not treat them as a diagnostic test on their own.
Which option answers which question?
| Tool | Answers | Does not answer |
|---|---|---|
| Online quiz | Should I talk to someone about this? | Does my child have ADHD? |
| Validated rating scale, scored by a clinician | How do my child's behaviours compare with others of the same age? | Why are they happening? |
| Computer attention task | How did my child respond on this task today? | Is this ADHD or something else? |
| Game-based observation (Mores) | How did my child approach challenges in play? | Any diagnosis |
| Clinical evaluation | Is this ADHD, something else, or within the usual range? | — |
A sensible first step
Write down what you notice for two weeks using the observation checklist, ask the teacher what they see, and take both to your pediatrician. A game-based observation can add concrete examples, but it is not an ADHD test.
Common questions
- Which online ADHD test for kids is most accurate?
- None is diagnostic. Validated rating scales such as the Vanderbilt are the standard, and they mean most when a clinician scores them alongside a teacher's form and your child's history.
- At what age can a child be tested for ADHD?
- The American Academy of Pediatrics guideline covers children from age 4. Many children are evaluated after starting school, when attention demands increase.
- Is there a blood test or brain scan for ADHD?
- No. There is no blood test or brain scan that diagnoses ADHD in routine practice.
Not a diagnosis. This guide is general information, not medical advice. If you are worried about your child, talk to your pediatrician. Written by the Mores Health team from the sources below; it has not yet been reviewed by a clinician.