Thanks for the ideas everyone. He did have one relative weakness on the SBV, which was knowledge. I don't believe that is related to either fine motor or processing speed, although I don't know enough about the tests to be sure. Having read into it, I do see possible signs of a processing speed problem in real life, so I'm definitely not dismissing it or assuming it's inaccurate. Correct me if I'm wrong, but I think the SBV doesn't include an assessment of processing speed? I know his working memory on SBV was a relative strength.
