ADHD Assessment - Is it Right For You? A private assessment could take up to two hours and includes a clinical interview with an expert in ADHD. It is useful to bring with you a friend or family member for support, but this is not required. A complete psychiatric record https://collingouyc.theideasblog.com/30224283/what-s-the-reason-you-re-failing-at-adhd-assessment-uk-private