It does seem that an inexperienced test giver (or even one who just isn't very experienced with gifted children) can result in a lower score.
DS 5.5 (then 3.5) had a very experienced test giver AND loves tests like that he just wanted more and more, so there was no problem with him cooperating the whole time. I almost think we might have a harder time with him doing so now then we did then. Now it could possibly depend on his mood how cooperative he would be which I would think would drastically affect his scores.
The spatial cluster has the copying part which is where DS did the 'worst'.
Did your friend's child have a bad day or was she possibly just bored with the test and didn't necessarily really try hard? I think that is where an experienced tester would help since they would see the 'signs' and do things differently to maintain the interest better.
