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)