Susan Young, DClinPsy, PhD, is a consultant clinical psychologist and director of Psychology Services Ltd. An Honorary Professor at Reykjavik University, she has over 30 years' experience in the field of ADHD, has led international ADHD guideline work, and developed widely used assessment and treatment programmes, including the ACEv.2 and ACE+v.2 interviews, now available in over 25 languages, and published extensively in clinical and academic settings.