Zen Scanner, I really think that the "how do the gifted score on the SB5" stuff is NOT about a problem with the SB5.
I read that particular study differently. Here's a key point:
"Since the assumption of normality can be questioned with scores this extreme, Kendall's tau b and Spearman's rho were calculated. The correlation between the SB5 and the WISC-III using Kendall's tan b was .341. Using Spearman's rho the correlation was .457. The correlation between the two tests for all IQ levels was .82 (Roid, 2003)."
Also some anecdotal stuff they included was interesting:
"Two students in the highly gifted program scored so low on the SB5 that they would not meet intelligence test criteria for giftedness even if the cut-off were lowered to 115..." "To check on whether these children were misclassified as gifted or highly gifted, anecdotal information was requested from their teachers. These data suggest that these children's original classifications were probably correct. For example, one of the highly gifted children had successfully completed a high-school level course as an elementary student; it is unlikely that a non-gifted child would perform in such a manner."
And ultimately that's the pivotal point: What gateway is most likely to get kids matched to the appropriate resources?
