If you've taken a free ADHD test online lately — including ours — chances are it was based on the ASRS-v1.1. So what is it, where did it come from, and what does (and doesn't) it actually tell you?
What ASRS stands for
ASRS = Adult ADHD Self-Report Scale. It was developed by the World Health Organization in collaboration with researchers at Harvard and the New York University School of Medicine. The 18-question full version, and a 6-question screener subset, were validated against clinical diagnoses across multiple studies starting in the early 2000s.
The 6-question screener (Part A) is the one used most often online. It's a good first filter — quick, free, and reasonably accurate.
How it scores
Each question asks how often you experience a specific symptom (Never, Rarely, Sometimes, Often, Very Often). The questions are weighted: certain answers count toward a "positive screen" and others don't. The original 6-question version uses cutoff thresholds — four or more of the highlighted answers suggests a likely ADHD diagnosis worth pursuing.
Some online tools — including ours — convert the responses to a 0-to-4 numeric scale and give you a total score. That gives you a more granular result and is easier to interpret over time.
What it does well
- It's free, fast, and validated.
- It catches the majority of adults who would meet diagnostic criteria.
- It avoids most of the leading-question pitfalls of Buzzfeed-style "Do you have ADHD?" quizzes.
- A low ASRS score doesn't rule out ADHD entirely, but it's a useful piece of evidence.
What it can't do
- It can't diagnose ADHD. Only a comprehensive evaluation with a clinician can do that.
- It doesn't differentiate ADHD from look-alikes. Anxiety, depression, sleep disorders, and thyroid problems can all produce ASRS-positive results without ADHD being the cause.
- It only screens for the adult presentation. Pediatric and adolescent ADHD use different tools.
- It depends on accurate self-report. If your insight into your own symptoms is limited, or if you're trying to game the result in either direction, the screener will reflect that.
What to do with your result
A low score: probably worth investigating other things if these struggles still affect your life — sleep, anxiety, lifestyle.
A moderate or high score: worth a real evaluation. The screener isn't going to tell you the whole story, but it's a strong enough signal to take the next step.
Bottom line: The ASRS is a smoke detector, not a fire marshal. It tells you when to investigate — not what's actually burning. That part requires a real clinician.
Wondering if it's ADHD?
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