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'''IQ''' or '''intelligence quotient''' is a measure of a person's cognitive ability. IQ is measured with tests that contain cognitive tasks that are very general and do not require specialization/schooling to answer, thus overlap with common sense. It is assumed no training has taken place for the IQ test, but modern IQ tests are also fairly sturdy i.e. resist the training effects by only testing untrainable abilities such as processing speed, bandwidth and logic. | '''IQ''' or '''intelligence quotient''' is a measure of a person's cognitive ability. IQ is measured with tests that contain cognitive tasks that are very general and do not require specialization/schooling to answer, thus overlap with common sense. It is assumed no training has taken place for the IQ test, but modern IQ tests are also fairly sturdy i.e. resist the training effects by only testing untrainable abilities such as processing speed, bandwidth and logic. | ||
Performance on different IQ tests | Performance on different IQ tests, as well as school and work performance correlate somewhat (r = ~0.5) which means IQ tests can predict ''general intelligence'', short ''g'', the ability to act intelligently in ''any'' cognitive task, even those which haven't been tested. A task in which people's performance correlates with g is said to be ''g-loaded''. | ||
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. This means IQ tests are relevant for can be used for screening. 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> It has been suggested a battery of at least three tests is necessary to assess general intelligence accurately (short-term memory, reasoning and verbal skills).<ref>https://www.telegraph.co.uk/news/science/science-news/9755929/IQ-tests-do-not-reflect-intelligence.html</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. This means IQ tests are relevant for can be used for screening. 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> It has been suggested a battery of at least three tests is necessary to assess general intelligence accurately (short-term memory, reasoning and verbal skills).<ref>https://www.telegraph.co.uk/news/science/science-news/9755929/IQ-tests-do-not-reflect-intelligence.html</ref> | ||