Autism and Attention Deficit Hyperactivity Disorder (ADHD) are both linked to internalising problems (e.g., anxiety, depression) but their frequent co-occurrence makes these relationships difficult to disentangle. We, therefore, adopted a trait-based approach to examine the unique associations of autism and ADHD with internalising problem diagnoses in a large general population sample of adults from the United Kingdom and United States (N = 4996). We then assessed whether these associations…
