My son recently took the WISC-IV and he tested with the following scores: <deleted>
The psychologist who did the testing did not calculate a GAI for whatever reason (though she did indicate that the FSIQ was likely underreporting his capabilities).
So I was curious and looked up how to calculate GAI. It appears that there are two methods of doing this: one uses the sum of the VCI and PRI, and the other uses the sum of the six subtests of those indices (his six subtest sum was 101). The subtest sum method seemed to state that it was a superior measure over methods that don't use subtest scores.
Is one method generally more accepted than the other? One method gives him a GAI of <lower score> and the other <higher score>.
Last edited by George C; 09/12/16 06:40 AM. Reason: removed scores to hamper data gathering
