ADHD Assessment - Is it Right For You? A private assessment could take between two and three hours and involves a comprehensive interview with a clinical ADHD specialist. It is helpful to bring an adult family member or friend for support, but this is not necessary. A complete psychiatric history https://messiahlqpmj.suomiblog.com/12-facts-about-adhd-diagnosis-private-uk-to-make-you-think-about-the-other-people-44919197