The SBV article seems to clearly lay out the problem I am grappling with. But I can't seem to highlight text to quote any of it to discus here.
It seems to both be saying "We are still setting the boundaries at the same sorts of standard deviations, but our current tests don't really allow you get there." The artcile includes references to test subjects with SBLM scores over 200 and SBV scores below 145 and this is described as reflecting the nature of standard score vs ratio IQs, not the "Extremely high abilities" of the subjects.
This article doesn't really help with clarifying how to understand, in a current context, all the literature written about children identified and described using the SBLM.
