I would caution, though, that it is doubtful that the norm group is deep enough to interpret at the +4 SD level, especially on a test where only somewhere between 20 and 50ish items are administered, even if it is an adaptive test.
It is a 54 question adaptive test.
There were 79,137 (2009) and 126,765 (2010) students in Test Events Pool for Mathematics
There were 78,230 (2009) and 127,894 (2010) students in Test Events Pool for Reading.
Nonetheless I take your point.
If you want a more accurate assessment of her cognition and academic skills, you might want to investigate comprehensive assessment through a qualified examiner, with a reliable individually-administered cognitive instrument, such as the WPPSI-IV, SBV, or DAS-II, and achievement instrument, such as the KTEA-3, WJIV, or WIAT-III. Just make sure whatever you have done won't interfere with the validity of the future GATE testing (2 year minimum time to re-test on cognitive ability tests).
Thank you that's insightful, I had not considered that issue.
