Neurodiversity is an umbrella term defined differently by different agencies Neurodiversity is a relatively new term, and the education system, health professionals and youth justice system all use different definitions for children with neurodiverse needs. There are clinical definitions for neurodevelopmental disorders. However, over reliance on these clinical definitions can be problematic within the youth justice system as many children will not have been assessed, diagnosed or meet the specific criteria for a diagnosis by the time they come into contact with the justice system. National data on neurodivergence in the justice system is not consistently required, defined, collected or maintained. Consequently, neurodivergence prevalence data is complex and often difficult to compare between sources.