My knowledge of IQ tests? well you could fit that on the head of a pin.
Does that mean there were potential ceilings on those sections where he wasn't at 18 or 19 but was at the highest age equivalent they report with that test?
Bearing in mind that my DS was tested on the WISC 3, I was never given raw scores as they told me the raw scores are scaled to age equivalent. I'm assuming that's what they did with the WISC 3?. She did however tell me she couldn't go any further on the subtests that he hit ceiling with. Which I suppose explains why she kept saying "we must use caution when interpreting these scores".
Personality (as others have mentioned) certainly played a part in DS' testing as well. The 3 subtests mentioned that used speed didn't match his personality type of being careful and cautious. The psychologist made mention of this also, stating he would always go over his work before looking up for the stop watch to be clicked off, which was a positive and successful attribute but penalised him when scoring.
