When a psychologist told me this, her "estimate" was that my son's GAI was 160+. I was stunned, since I thought it would be around 140. It turns out that she was looking at the wrong page in the book (actually at more than one wrong page), so the scores were for a kid who was around 1-2 years younger (or maybe more). His actual GAI was 140.
That said, I think this particular psychologist had some issues. For all other evaluations my kids have gone through, the numbers the evaluators gave before entering everything into the software were right on.
