How to Test for ADHD: Tools Clinicians Actually Use
👉 Take the free 18-question ADHD self-test (3 min) on the homepage — Start the ADHD Test.
There's no blood test or brain scan
ADHD is diagnosed clinically, using DSM-5 criteria. There is no lab test, no MRI, and no single 'ADHD test' that gives a yes/no answer. Instead, clinicians combine multiple tools.
Validated rating scales
ASRS-v1.1 (the same one we use in our free online test), CAARS (Conners' Adult ADHD Rating Scales), BAARS-IV (Barkley), and the Wender Utah Rating Scale for childhood symptoms.
Structured clinical interview
A 60–90 minute conversation covering DSM-5 symptom criteria, age of onset (before 12), presence in 2+ settings, functional impairment, and differential diagnoses (anxiety, depression, sleep disorders, thyroid issues).
Continuous Performance Tests (CPTs)
Computerized attention tasks like TOVA, CPT-3, or QbTest. They add data but are not required for diagnosis. Useful as supplementary evidence.
Collateral information
Clinicians often request input from a parent, partner, or close friend, plus old report cards. ADHD is a lifetime condition — childhood evidence strengthens the case.