I think it's hard to tell so much from one test. Others can give more concrete info but kids can score very different on the PSI/WMI portion of the WISCIV vs the SBV. THe SBV is supposed to be more engaging. If it's one aberrant subtest for PSI, I think it's more suspect. Now if the scores match something you see at home, then that's another matter. I would try to pursue more testing to get at what the issue is, if at all possible.
Everyday math often repeats topic so it's hard to go by what's in the TOCs b/c not all that is mastery depending on the grade....much of it at certain times is just exposure and mastery is expected the next year.
