IQ is largely a pseudoscientific swindle

(Revised draft: added comments on sinister country profiling. Also 1) Used the same data as researchers to find that R² for IQ-wealth and IQ-income is effectively 0 in spite of the circularity. 2) Turns out IQ beats random selection in the best of applications by less than 6%, typically <2%, as the computation of correlations have a flaw and psychologists do not seem to know the informational value of correlation in terms of “how much do I gain information about B knowing A” and propagation of error (intra-test variance for a single individual). 3) Added information showing the story behind the effectiveness of Average National IQ is, statistically, a fraud. The psychologists who engaged me on this piece — with verbose writeups —made the mistake of showing me the best they got: papers with the strongest pro-IQ arguments. They do not seem to grasp what noise/signal really means in practice. ) <a href="https://medium.com/incerto/iq-is-largely-a-pseudoscientific-swindle-f131c101ba39">Read More</a>