Some of the IQ and achievement tests in common use rely on social skills or social logic that a child with ASD simply doesn't have in place (yet).
Sometimes you can get a better measure on the Differential Abilities Scale or the Raven. But I'd say it's probably not urgent at this point to have a good number-- better to find a clinician who understands the complexity of him beyond his test scores, and is willing to meet him where he is in working on the missing skills.
Yes. Especially the last sentence.
And on the scores: Note, in particular, the difference between verbal knowledge, which is vocabulary, and nonverbal knowledge, which is predominantly social perception.
