Does anyone know if WISC-IV Technical Report #4, issued in January 2005, is the most current? I'm trying to figure out if this is what our tester would have used to calculate our child's GAI.

As I understand it, GAI is determined by taking the 3 Perceptual Reasoning and the 3 Verbal Comprehension subtest scores, summing them, and finding the corresponding GAI in the table. Is that correct?

If it is correct, our tester calculated an incorrect GAI. In fact, the GAI that he recorded is not even a valid GAI as far as I can tell. It doesn't occur on the table in this link:

http://www.pearsonassessmentsupport...file&CategoryID=3869&EntryID=353

Any insight into calculating the GAI?

The Technical Report #4 January 2005 is the site that was shared with me. Our tester is redoing my child's scores, and that is what she used to figure out the GAI.