Hi everyone
My son (4yr 11mo) recently completed the SB-V and I received the results today. He is not gifted, but I was wondering if anyone can help shed light on his subtest scores, particularly the low knowledge score? The psychologist wasn't particularly forthcoming with information about what seems like a bit of a wide spread of scores and what the lower score in the knowledge section means.

Non-verbal:
Fluid reasoning 14 (91st percentile)
Knowledge 10 (50th percentile)
Quantitative reasoning 13 (84th)
Visual spatial 18 (99.6th)
Working memory 13 (84th)

Verbal:
Fluid reasoning: 16 (98th)
Knowledge: 11 (63rd)
Quantitative reasoning. 14 (91st)
Visual Spatial. 15 (95th)
Working memory. 19 (99.9)

FSIQ: 128 (97th)