there is a "creativity" part to the assessment where he, being shyer, may not do as well.
Is it the Torrance Test for Creative Thinking? If so, I do not think that shyness factors into this one bit. DD is not the least bit shy and quite imaginative, and this is the only part of her school's gifted testing that she did not score very, very high on (luckily, it is only one factor)...then, again, I didn't think very much of the test as a creativity measure, either.
I also have heard what LAF stated about siblings often being within 10 points and in our case it is true. FWIW, my two DC measured 1-3 points apart on IQ testing, depending on how the composite is measured. Their areas of relative strength, however, are COMPLETELY different, so that makes their close scores (which are supposedly rare) rather mind-blowing, IMO.
