I had another thought, which was (though functionally invalid by the way tests are normed) to compare raw scores across age groupings. You could see them here for extended norms:
http://images.pearsonclinical.com/images/assets/WISC-IV/WISCIV_TechReport_7.pdf

So, if you had say a 26 on similarities, you could get to saying that's more answered than over 99% of 18 year olds. By cross-referencing the raw score to higher ages, you can see score of 40 maps to 18 throughout later ages. Vocabulary looks trickier as that is more age impacted, a 25 at age 6 translates to 46, which following it through the years, hits 18 which could be more than 99% of 9 year olds.

Real rough, and not truly valid if people call you on it.

Soryr, just saw your update; not sure this could help or not.

Last edited by Zen Scanner; 09/24/14 02:06 PM.