&gt; For children the test takes, &quot;48–65 minutes to administer&quot; and requires more than pencil-and-paper [1].<p>For the full-scale WAIS, perhaps. But you can still extract a good estimate from the subscales, and needless to say, the WAIS is far from the only IQ test out there.<p>&gt; I think doing a regular comparison of the standard IQ test results with this new scanning method could be a good way to account for test bias [2].<p>Huh? The brain scans are being validated using the existing IQ tests in the first place, and if one doesn&#x27;t accept all the existing literature on the unbiasedness of current IQ tests (where the concepts are not too difficult - for example, I think many laymen could get through and understand most of _Bias in Mental Testing_, Jensen 1980 <a href="http:&#x2F;&#x2F;emilkirkegaard.dk&#x2F;en&#x2F;wp-content&#x2F;uploads&#x2F;Bias-in-Mental-Testing-Arthur-R.-Jensen.pdf" rel="nofollow">http:&#x2F;&#x2F;emilkirkegaard.dk&#x2F;en&#x2F;wp-content&#x2F;uploads&#x2F;Bias-in-Menta...</a> explaining what biases there would be, how one would test for them, and why IQ tests are unbiased), one is not going to accept the results of the infinitely more complicated &amp; subtler brain imaging pipeline where there&#x27;s so many details &amp; variability that they had a pretty serious replicability problem for a while, especially when they just yield the same results that the original IQ tests would have.