If a child can’t sit still or blurts out random thoughts in kindergarten or first grade, does the child have attention-deficit/hyperactivity disorder (ADHD)? Or is the youngster just not mature enough to sit still yet?
Both are possibilities, and whichever might be true, new research suggests that the youngest kids in class are being diagnosed with ADHD, intellectual disability and even depression around 30% more often than their oldest classmates.
