A recent study involving a large group of children has shed light on why attention-deficit/hyperactivity disorder (ADHD), dyslexia, and dyscalculia frequently appear together. Researchers discovered that the likelihood of developing ADHD overlaps genetically with the likelihood of developing dyslexia and dyscalculia. This shared genetic basis helps explain why children with ADHD are more prone to experience difficulties in reading, spelling, and mathematics.