Thanks, Dottie. The explanation is most helpful. I'm trying to fully understand the calculations, myself, so that I am more useful to DS7 when dealing with his school. And it's genuinely interesting, as well.

I would be very grateful to have the math checked. I just have scaled scores and they are:

VC: 16; 17; 13
PR: 14; 13; 14
WM: 13; 16
PS: 8; 11

He did other subtests, as well, but I understand those don't factor in to the overall calculations (is that right?). I can forward them if they are relevant.

Thanks so much.