More Words, Deeper Hole

Stanford-Binet is, in my professional opinion, worthless. It is not normed as rigorously as the tests are we use today. So if Keyes was using a Stanford-Binet assessment, then yes, I'd agree.

I don't know of anyone who uses Stanford-Binet for IQ assessment now. It's either the Weschler batteries (early childhood, childhood, or adult) or the Woodcock-Johnson Tests of Cognition. IIRC, Stanford-Binet was a paper and pencil test and that simply is not an accurate measure of IQ. One-on-one, individual administration as you get with the Weschler batteries or the WJ Cog are simply much more accurate because they do not depend upon reading or test-taking ability. A Weschler or WJ administration ain't the same thing, and I do a LOT of WJ academic administrations. They are expensive for that very reason--you have to do them one-on-one, and the best people who administer such tests take rigorous notes on what they observe during the testing process.

I'm also suspicious of that Wikipedia article you cite, simply because it omits some significant details. The author(s) tend to treat the IQ tests as one and the same, where as I note above, there's a significant difference between the Stanford-Binet and the Weschler or WJ batteries.

Myself, I think the factor that makes a difference in how we calculate results from these assessments is that we are improving tests and the algorithms we use to calculate the results. I work very closely with the Woodcock-Johnson academic assessments. We changed to the WJ IV over the past two years. Part of the norming process includes eliminating cultural references that may skew the assessment. The new WJ IV has much fewer of those than the WJ III, which is HUGE in my experience. And that's just on the academic side. Though it still skews high in writing, but writing is another ranty area that I'll spare folks on.

(and yes, I think the current tests are a more accurate assessment of cognition, including memory both short and long term, learned material, processing speed, and previous knowledge. Previous knowledge or passions can seriously skew individual question results and such things need to be taken into consideration. Which is why the most accurate assessments are individual, using one-on-one testing with copious note-taking)