The WHO Adult ADHD Self-Report Scale — the most widely used validated ADHD screener for adults worldwide. Developed by the World Health Organization and Harvard Medical School. The 18-item version covers both inattentive and hyperactive/impulsive symptom domains.
~5 minutes18 questions · Part A + Part BFree · Private · No account needed
Before you begin: The ASRS uses two parts. Part A (6 items) is the primary clinical screener — 4 or more items above threshold is considered a positive screen. Part B (12 items) provides additional symptom information. ADHD in adults often looks different than childhood presentations, and is frequently missed in women, non-binary people, and autistic individuals. This is a screening tool, not a diagnosis.
This is a screening questionnaire, not a diagnosis. It was developed for research and produces a score that indicates whether a fuller assessment may be worth pursuing. A score cannot tell you whether you are ADHD. Only a qualified clinician working with your full history can do that.
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