James Thompson reviewed The Science of Human Intelligence by Richard Haier, et al. It looks like an IQ tour de force.
It is a common trope among the uninformed that intelligence does not account for anything much in the real world. Being smart is being book smart, a rather limited ability. But this is not true. The authors show in tables that the relation between IQ and many desirable real-life outcomes is positive and significant. In contrast, the relation between IQ and many undesirable outcomes (e.g., schizophrenia) is negative and significant. Intelligence enhances and protects.
Other tables show more detailed relations between intelligence and workplace performance—which is high, especially for complex tasks. Despite searching for other contributing factors, including variables related to very specific jobs, a summary of thirty years of research on general and specific cognitive abilities concluded: “Still not much more than g” (Ree and Caretta, 2022).
Like it or not, g is the single best predictor of academic and occupational success. This section should be general knowledge, at least among psychologists.
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The authors sum up:
Intelligence can be defined; measured; is reliable and valid; tests are not biased against populations when used properly; the general factor is the single most predictive score for a wide variety of real-world outcomes; and is linked to quantifiable brain features that appear to have developmental sequences; individual differences are influenced by genetics although details at the molecular level are only just being investigated; environmental factors are relevant though there is no clear model of their impact on the brain; the sources of average population differences are not agreed but are being investigated; there is no proven way of boosting intelligence though genetics may provide one; being more intelligent is no guarantee of being morally better (though you might be), but enhanced intelligence might help us solve important global problems.
It’s in my booklist, along with 50+ others. Based on Thompson’s review, it looks compelling.