Sorry not to have responded earlier; I just saw your latest post. Although a 95th percentile score on BD was lower than the other parts of the PRI index, that is still a very good score and I wouldn't view that as showing low speed. My dd with the slower speed got a 25th percentile score on BD and 99th & 99.9th on the two other tests in PRI. That's a big difference.
I do, honestly, think that she could have scored more in the 50th-75th range on BD had the tester not kept reminding her to work fast. She apparently totally gave up, handed the blocks back, and said that she was done with that test and couldn't do it. I still do think that she is slower, though, but anxiety exacerbated the speed thing for her making it below avg in that one testing instance rather than avg, which is probably more accurate for her.
I may not have been clear in my earlier post. What I was getting at was that, if he did well on BD (which he did), since it is a timed test I'd think that he isn't truly a slow processor, but rather has other issues that might make him slower in certain circumstances. Perfectionism could be one of those issues.
