My eldest was tested on the WiSC at 7 and the SB5 last month, her FSIQ was 8 points higher on the SB than her GAI on the WISC. I put this down to:
1) actual better functioning (she's 2e and has changed a lot)
2) far better tested rapport
3) test picked up her visual spatial strength
My 5yr old did the WPPSI 6 months ago and the SB5 last month, her FSIQ tested 8 points higher and DYS level on the SB5. I put this down almost exclusively to better tester rapport so she did the whole test, less test fatigue was probably also an issue.
