Hey when I was diagnosed they told me they couldn't give me a full scale IQ because there was such a big difference between my working memory/processing skills and the others (more than 20 points). I haven't been able to find much information of this but I would have though it happens quite a bit to adhd people. Do you know anyone who has been told this? Is it really, really abnormal?
Yes, I know several people who have ADHD who could not get a useful overall IQ score. It just means you’re really good at some things and not so good at other things, but an average of your subscores would say you were just average at everything, which you are not. Neurotypical people are usually equally skilled (or unskilled) at most things, so an average of their subscores would be similar to the individual subscores.
For example, in my anecdotal experience, an NT is more likely to get about the same grades in all school subjects or about the same score on all exam subjects, but an ADHDer is more likely to have uneven grades and uneven subject scores.