The Importance of an Adult ADHD Assessment You should have an assessment if you suspect you may have ADHD. Then, you will know whether you need to seek treatment. You can either do the assessment yourself, or hire an expert to carry it out. Cognitive testing Cognitive testing for adults https://vuf.minagricultura.gov.co/Lists/Informacin%20Servicios%20Web/DispForm.aspx?ID=8564577