My DS8's verbal score is 13 points higher than nonverbal score on the SB5. Also, his knowledge index score is the lowest of all.
(94th percentile) Furthermore, there is a huge difference between nonverbal knowledge(scaled score 10) and verbal knowledge.(18)
I asked the psychologist about it. He said that the low nonverbal knowledge score is partly based on his learning style and may be partly based on attention. He may not have been as interested or tuned in to the pictures as he was to the word problems/stimuli. He is more of a verbal learner. The psych reminded me that score of "10" looks "deficit" when the rest of the scores are in the 16/17/18, it is average, not an area of deficit compared to the normative population. He said that many/most kids and adults have significant variation in subtest scores.
Hope this helps.
