The aim of the current study was to identify functional predictors of perceived impact of childhood disability among families of children with neurodevelopmental disorders and disabilities. We first examined the relationship between sub‐domains of adaptive and problematic behaviour and perceived family impact. Second, we examined whether the same sub‐domains would emerge as significant after controlling for the impact of child diagnosis, including autism spectrum disorder, cerebral palsy and intellectual disability.. To read the full article, log in using your MPFT NHS OpenAthens details.