IQ scores are derived from several standardized tests and used as predictors of future success in school, job performance and income. It is therefore critical that these tests give us an accurate measurement of general intelligence.
In today's lesson, Satoshi Kanasawa argues that an IQ score is just that: a pure measure of intelligence. It measures someone’s ability to think and reason in various contexts and situations, such as numerical manipulations like arithmetic, verbal comprehension like reading, and mental visualization like spatiovisual rotation. Believe it or not, all these cognitive abilities have something in common, and that something is general intelligence. So intelligence is precisely and exactly what IQ tests measure. Intelligence is what allows us to perform on all kinds of cognitive tests.