My son just took the RIAS this past weekend. He took the Weschler and SBV last year and with his Dyspraxia and SPD, the tester stated it was very clear that this issues got in the way (he scored super high in many areas and then super low in a handful - so the low scores pulled down the highs and averaged him off) of the testing so we tried another round this weekend with an assessor who understood SPD. She suggested the RIAS for the same reason you were told - my son is very visual. With the RIAS there is no manipulation of items (such as blocks - which was the lowest score for my son on the past tests due to his Dyspraxia) and it moves very quickly even though he was back with her for well over an hour so it didn't take 20 minutes. He did ceiling the test as she put it for the reason you stated so his final score outcome, she informed us that his FSIQ is probably higher than what is shown. But it was the first test that has finally given us some confirmation that we weren't crazy concerning his gifted level and we can bring it to the school.
