IQ tests being invalid is more politics than science. Among other things, rejecting the existence of cognitive inequality is necessary to justify systemic racism via the continued existence of Asian quotas (Affirmative Action). Since lots of people benefit from this racism, there’s a huge interest in denial. In western countries, when there’s a few billion people in Asia, and you let a tiny amount in gatekeeping them on the basis of education/wealth/skills, it isn’t really all that much of a shock that they and their children are smarter then average. The only way this could NOT happen is if Asians were LESS intelligent than other groups on average.
IQ tests are hilariously predictive of success if you’re doing a task which is similar to taking an IQ test like academics. They strongly indicate certain mental disorders. Low IQ is more predictive of success than High IQ. Maybe people take the difference between scoring a FSIQ of 110 vs 140 entirely too seriously, but the difference between somebody with 60 vs 90 is staggering.
IQ tests are hilariously predictive of success if you’re doing a task which is similar to taking an IQ test like academics. They strongly indicate certain mental disorders. Low IQ is more predictive of success than High IQ. Maybe people take the difference between scoring a FSIQ of 110 vs 140 entirely too seriously, but the difference between somebody with 60 vs 90 is staggering.