Thanks Dottie and thanks for remembering my other post. We finally got the updated report, which is what I am questioning.
His other test scores were as follows:
WMI - Sum of scaled scores 24 and composite score 110
PSI - Sum of scaled scores 23 and composite score 109.
So in my opinion there is a significant and unusual discrepany between the WMI and VCI, as well as between the PRI and PSI. However, to your point, I'm not sure what is considered significant and unusual. My DS was 6 yrs 7 mos at the time of the test if that helps.
The psychologist reason for the using the GAI in the report is because the "variation in the Indexes that compose the FSIQ is greater than 1.5 standard deviations, the FSIQ is considered uninterpretable". She cites that the "standard score difference between the VCI and PRI is less than 23 points; therefore the GAI may be used as a reliable and valid measurement of his current global intellectual ability."