While neuropsych testing is definitely helpful for teasing out strengths and weaknesses, please note that they have very little value in determining if someone has ADHD or not



The diagnosis of ADHD is based on the DSM-V-TR criteria, based on behavior and excluding other potential conditions causing these symptoms. It is a clinical diagnosis, not a diagnosis based on testing.

Besides, considering your teen's very high IQ, perhaps they have been compensating well enough to the point it doesn't show up on the test. Their symptoms may also be channeled into socially acceptable things, for example "on the go like a motor," presenting as an extremely productive and very curious child.

Yes, when I was young, I sometimes presented like that. Now? ADHD. Even though my testing as a kid was decent.