I'm not an expert, but I believe many consider the SB-LM to be out of date. There are pages on the web with rationales for its continued use, but it seems to dwindle year to year and to be accepted fewer and fewer places. That said, I think it will probably help give you more insight into your son's intellectual makeup.

A big difference you will see is that the SB-LM generates ratio IQ scores (based on estimated mental age), so the numbers will be higher and not based on standard deviations from the mean / rarity of scores. So it's a case of old apples, though with a bit of juice left, and newer oranges.

Striving to increase my rate of flow, and fight forum gloopiness. sick