Purpose The study aimed to assess the value of event-related potentials (ERP) of executive functions in distinguishing between attention deficit hyperactivity disorder (ADHD) and ADHD combined with autism spectrum disorder (ADHD&ASD). Methods This retrospective analysis included 204 participants divided into three groups: ADHD&ASD (64/204), ADHD (70/204), and typical development (TD) (70/204). Neuropsychological tests, including the Digit Span Test, Behavior Rating Inventory of Executive…