Does anyone know how to get a GAI from a child's raw scores on the WISC-IV? The only guide I found on a link here did not seem right. I asked for my DGS's scores and I got raw scores and not scaled scores. He had a 43-point difference in his PRI and PSI and 22-point difference in his VCI and WMI, so I think a GAI would be a better estimate of his abilities, and the school psych does not calculate that. Thanks for the help.

leahchris