Yep. And that helps many IQ tests to be biased (consciously or not) in favor of the interests (and assumptions) that create the tests. EG a written test will in

Yep. And that helps many IQ tests to be biased (consciously or not) in favor of the interests (and assumptions) that create the tests. EG a written test will inaccurately 'measure' the abilities of people who (for whatever reasons) can't read well. Those who are well-fed and -slept, secure, unfraid, healthy, and enjoy lots of educational opportunities will arrive for the test with an advantage.