Assessing adolescent and adult intelligence

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…-nurture debate, aptitudes, and group differences. American Psychologist, 43, 713-720. Mange, A. & Mange, E. J. (1990). Genetics: Human Aspects. Kaufman, Alan S. (1990). Assessing Adolescent and Adult Intelligence. So any statement in this thread that heritability somehow constrains the expression of g or of IQ is actually conceptually incorrect.

…-nurture debate, aptitudes, and group differences. American Psychologist, 43, 713-720. Mange, A. & Mange, E. J. (1990). Genetics: Human Aspects. Kaufman, Alan S. (1990). Assessing Adolescent and Adult Intelligence. So the statement above that heritability somehow constrains the expression of IQ or of consequences of IQ such as occupational success is actually conceptually incorrect. But I appreciate you going to the effort of doing the math. Another thought is that relating one correlation coefficient to another with linear algebra probably depends too heavily on applying linear tools to a not fully linear model. Increases of income are plainly linear and are on a ratio scale. (There is a zero point for income, and each dollar increase in income has the same magnitude anywhere along the scale.) But IQ test standard scores are at best ordi…