All IQ tests do measure things that people literally do teach themselves. From finding synonyms and antonyms, to finding the center of mass of a shape, to XORin

All IQ tests do measure things that people literally do teach themselves. From finding synonyms and antonyms, to finding the center of mass of a shape, to XORing two bitmaps, etc.. Research has found that differences in IQ at a young age are not very stable over a lifetime. That being said, education starts at birth, and cognitive development doesn't go at the same speed for everyone even when the endpoint is the same. And actual, we did find that education does raise IQ in a significant and sustained way, with measured increases persisting for 40 years : https://journals.sagepub.com/doi/10.1177/0956797618774253 https://journals.sagepub.com/doi/10.1177/0956797618774253 (ie, the OP)