DD actually did better on the CPT than DS, even though DD has more obvious/severe ADHD. She scored in the average range but in a noisy, chaotic classroom she is like a space cadet. I don't think there is any perfect test, you just kind of have to weigh the evidence. I'm still not sure if DS has ADHD or not, because people talk about poor focus, but I don't notice the same sort of distractability at home. So it's hard to say what is causing the focus issues, it could be any number of things. He claims that in math, for instance, he is so excited to be there and talk to the older kids. To the teacher, though, it might look like ADHD.