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Performance on different IQ tests correlates somewhat (r = ~0.5) which means IQ tests can assess someone's ''general intelligence'', i.e. someone's ability to act intelligently in cognitive tasks which haven't been tested. IQ has also been found to correlate with certain physiological measures, such as reaction time<ref>https://www.sciencedirect.com/science/article/abs/pii/S0160289601000629</ref>, brain volume,<ref>https://www.sciencedirect.com/science/article/abs/pii/S0160289616303385</ref> and color discrimation.<ref>https://www.sciencedirect.com/science/article/abs/pii/S0160289601000666</ref> This has lead to the conclusion that the more intelligent generally have more efficient and functional brains on a physiological level. | Performance on different IQ tests correlates somewhat (r = ~0.5) which means IQ tests can assess someone's ''general intelligence'', i.e. someone's ability to act intelligently in cognitive tasks which haven't been tested. IQ has also been found to correlate with certain physiological measures, such as reaction time<ref>https://www.sciencedirect.com/science/article/abs/pii/S0160289601000629</ref>, brain volume,<ref>https://www.sciencedirect.com/science/article/abs/pii/S0160289616303385</ref> and color discrimation.<ref>https://www.sciencedirect.com/science/article/abs/pii/S0160289601000666</ref> This has lead to the conclusion that the more intelligent generally have more efficient and functional brains on a physiological level. | ||
Abilities that are relevant for all cognitive tasks are for example to quickly learn, | Abilities that are relevant for all cognitive tasks are for example to quickly learn, retrieve and process a maximal amount of information and to quickly consider different hypotheses without losing track of things. These abilities enable one to better find a solution to any given problem and a path to any given goal. | ||
Even real-life cognitive tasks like achievement in school and at work, even social skills (but only declarative knowledge about social events, not so much gossipy socializing<ref>https://psychology.stackexchange.com/questions/9746/does-high-iq-correlate-with-good-social-skills</ref>) are just as much correlated with general intelligence as IQ tests. Even though IQ is an imperfect measure, it allows to very reliably decide for example that a person with IQ less than 90 is very likely to fail in an academic math course and that 115 is a minimum for achieving a graduate degree with satisfying grades.<ref>http://emilkirkegaard.dk/en/wp-content/uploads/Bias-in-Mental-Testing-Arthur-R.-Jensen.pdf</ref> | Even real-life cognitive tasks like achievement in school and at work, even social skills (but only declarative knowledge about social events, not so much gossipy socializing<ref>https://psychology.stackexchange.com/questions/9746/does-high-iq-correlate-with-good-social-skills</ref>) are just as much correlated with general intelligence as IQ tests. Even though IQ is an imperfect measure, it allows to very reliably decide for example that a person with IQ less than 90 is very likely to fail in an academic math course and that 115 is a minimum for achieving a graduate degree with satisfying grades.<ref>http://emilkirkegaard.dk/en/wp-content/uploads/Bias-in-Mental-Testing-Arthur-R.-Jensen.pdf</ref> | ||