Tigerle the SB5 isn't used for things like ADHD and ASD diagnosis in Australia because a) an IQ test is not the gold standard for diagnosing either disorder, but b) when an IQ test is done the testers usually really want to see the WISC WMI and PSI tests. The SB5 is pretty good at hiding the weaknesses of some kids - the working memory test is quite different to the WISC (and often described as gentler or easier, though some would say it's simply different) and there is no equivalent to the PSI section of the WISC, which is really a very useful tool when used with other tests in the diagnostic process (for all manner of issues, not just ASD and ADHD).