Yes, that's almost exactly what my dd#2's WISC-IV results looked like when she was 7.5. She had four scores at 18 btwn the PRI and VCI if I recall correctly. Her PRI total was at the 99th and VCI total was at the 99.7th, so not quite as high as your ds's. Her WMI and PSI were both avg (btwn the 50th to 60-something). I, obviously, don't have the scores in front of me. I do recall, though, that the tester was unfamiliar with the GAI and just gave us a FSIQ of 130. When I pulled the GAI off the technical report #4, it came out at 148. I really should take a look at technical report #7 & see if those 18s would go up with extended norms, though. If her EXPLORE scores come out really high, I may give more thought to this. The reason I haven't is that we got a really unofficial looking report that I doubt would work for Davidson b/c it's not even on letterhead! I do have the WISC forms with all of the raw scores as well, though.
We had dd retested almost exactly a year later b/c she is very, very erratic and we just don't know what is going on with her. I was concerned about a 2E issue. The psych who tested her didn't seem concerned with her PRI dropping from the 99th to the 75th percentile and chalked it up to "fluctuation" in abilities. Her PRI went from the 99.7th to the 99th, so probably not as big of a drop. Her WMI and PSI were, again, fairly avg. The psych said that she didn't have any learning disabilities b/c her WIAT scores were all in the 98t & 99th percentile but then she also gave me identical WIAT scores using age norms & grade norms which I can't imagine is correct since she is quite young for grade. So, I figure that her true age norms are actually higher or her true grade norms are actually lower. I just don't know which one it is.
eta: her GAI the second time was 20 points lower -- at the 97th percentile rather than the 99.9th from the first testing. The kiddo makes my head spin.
My biggest concern with her is that she is convinced that she isn't very bright
Long story short, my other dd is low on PSI in comparison to the other three indices, but nothing like this. Despite being assured that dd doesn't have anything else going on, having both of those two indices that much lower is a red flag for me. My gut tells me that there is something else going on in my dd's case. I wouldn't rule out twice exceptionality.
Have you had any achievement testing done such that you can see if there is a big ability/achievement discrepancy?
