I am sure the scores can vary greatly. As I
analysised Serena's scores I think I could
see the involvement between her characteristics
and the test giver. I was not there, but I
can see Serena's reactions to some situations.
It's quite long and complex, you have to
know Serena well. But I am of the opinion
that her score could have varied on just that
test some 12 points in IQ. I think that is alot.
And I think that might be very common.
If you are interested I will be glad to further
explain.

RPBauman