OP. I got completely sidetracked from saying that although I personally like the SB5, any test on any given day can go wrong for whatever reason. Bad mood, bad tester/subject fit. It's possible your child's profile is unexpected/uneven. It's also possible that the SB5 results are inaccurate for whatever reason. I just don't think the most likely reason for that is the SB5 being weird. For what it's worth my DD's lowest score was QR too...