The Adult ADHD Self-Report Scale (ASRS-v1.1), developed with the World Health Organization, is the standard brief screener for adult ADHD. It covers both inattention and hyperactivity-impulsivity symptom clusters. Answer based on how you've been over the past 6 months. This screener is not a diagnosis — a clinician evaluation is required for that.
This is a screening tool, not a diagnostic instrument. ADHD is diagnosed through comprehensive clinical evaluation including history, impairment assessment, and ruling out other causes.