Hiring.

This isn't the actual issue with them, the actual issue is "correlation is not causation". IQ is a normal distribution by definition, but there's no reason to believe the underlying structure is normal.

If some people in the test population got 0s because the test was in English and they didn't speak English, and then everyone else got random results, it'd still correlate with job performance if the job required you to speak English. Wouldn't mean much though.

Do you have data to back that up? Are you really trying to claim that there is no difference in outcomes from the average or below average graduate and summa cum laude?

It’s about trend. Not <Test Result>==Success. These evaluations try to put an objective number to what most of us can evaluate instinctively. They are not perfect or necessarily fair. Many, maybe most, job interviews are really a vibe assessment, so it’s an imperfect thing!

I don’t know my IQ, but I probably would score above average and have undiagnosed ADHD. I scored in the 95th percentile + on most standardized tests in school but tended to have meh grades. I’m great at what I do, but I would be an awful pilot or surgeon.

Growing up, you know a bunch of people. Some are dumb, some are brilliant, some disciplined, some impetuous.

Think back, and more of the smart ones tend to align with professions that require more brainpower. But you probably also know people who weren’t brilliant at math or academics, but they had focus and did really well.