IQ Denialism is an extremely respectable form of anti-science conspiracy theory-mongering.
Of course, if IQ were just a delusion of white male privileged racists, it would be hard to explain how test scores could be forecast from brain scans. Slowly, however, that’s becoming more feasible to accomplish.
Steve Hsu has a post, “IQ prediction from structural MRI,” about a new paper at PLOS called “MRI-Based Intelligence Quotient (IQ) Estimation with Sparse Learning” that claims quite high correlations between data from brain scans and IQ.
Estimating IQ with Brain Scans
Hsu’s blog post is quite accessible to yeomen. Notably:
These authors use machine learning techniques to build sparse predictors based on grey/white matter volumes of specific regions. Correlations obtained are ~ 0.7 (see figure).