For accurate, up-to-date information and to find qualified help, rely on established clinical and public-health bodies. The organisations below are widely recognised in the United States and internationally.
A leading US non-profit providing education, advocacy and support for people affected by ADHD, and home of the National Resource Center on ADHD.
Visit CHADDThe leading US organisation focused specifically on adults with ADHD, offering resources, peer support and webinars.
Visit ADDAThe US federal agency for research on mental disorders, with authoritative, plain-language information on ADHD.
Visit NIMHUS public-health guidance on ADHD symptoms, diagnosis, treatment and data across the lifespan.
Visit CDCPublisher of the DSM-5-TR diagnostic criteria used by US clinicians and patient-facing explainers on ADHD.
Visit APAThe UN health agency that co-developed the Adult ADHD Self-Report Scale (ASRS) and maintains the ICD classification of disorders.
Visit WHOThe screening on this site is an original educational adaptation covering the same symptom domains as the WHO/Harvard Adult ADHD Self-Report Scale (ASRS-v1.1). It does not reproduce the copyrighted ASRS wording. Clinicians and researchers should use the official, licensed ASRS-v1.1 from the World Health Organization.