You should distinguish between “intelligence as a trait of the brain which we are trying to measure” and “the result of using a specific IQ test”. Learning the IQ test is like standing on tiptoes when someone measures your height… yes, you will get a higher result, but you didn’t actually grow up, you just cheated the test. You can cheat the IQ test and get a higher score e.g. by learning the right answers, but that doesn’t increase your intelligence as such.
(And by the way, please do not take online IQ tests, ever. They are practically all scams. Especially those that say they are endorsed by <whatever organization>; they are not.)
Intelligence is not the same as knowledge or skill. As you get older, you naturally get more knowledge, and you get more skills. And the IQ tests adjust for this; they are calibrated for each age group separately, so a 10 years old would get higher IQ than a 20 years old if both answer correctly 15 out of 20 questions.
In practice, IQ is measured by test (because, how else would you measure it?), and you can cheat by specifically preparing for the test. That increases your test score, but not the underlying intelligence. For example, imagine that someone spends years practicing for one IQ test, and then is unexpectedly given a completely different IQ test. This would probably result in their “true IQ” being revealed.
Shortly, you should imagine intelligence as something like “ability to solve new problems”. Of course, there is the technical problem that whenever someone designs a test that measures this ability, people can take the test repeatedly or find the questions and answers online, and then the problems are no longer “new” for them. Yes, this is a problem of tests. It does not make the underlying concept of “ability to solve new problems” invalid.
You should distinguish between “intelligence as a trait of the brain which we are trying to measure” and “the result of using a specific IQ test”. Learning the IQ test is like standing on tiptoes when someone measures your height… yes, you will get a higher result, but you didn’t actually grow up, you just cheated the test. You can cheat the IQ test and get a higher score e.g. by learning the right answers, but that doesn’t increase your intelligence as such.
(And by the way, please do not take online IQ tests, ever. They are practically all scams. Especially those that say they are endorsed by <whatever organization>; they are not.)
Intelligence is not the same as knowledge or skill. As you get older, you naturally get more knowledge, and you get more skills. And the IQ tests adjust for this; they are calibrated for each age group separately, so a 10 years old would get higher IQ than a 20 years old if both answer correctly 15 out of 20 questions.
In practice, IQ is measured by test (because, how else would you measure it?), and you can cheat by specifically preparing for the test. That increases your test score, but not the underlying intelligence. For example, imagine that someone spends years practicing for one IQ test, and then is unexpectedly given a completely different IQ test. This would probably result in their “true IQ” being revealed.
Shortly, you should imagine intelligence as something like “ability to solve new problems”. Of course, there is the technical problem that whenever someone designs a test that measures this ability, people can take the test repeatedly or find the questions and answers online, and then the problems are no longer “new” for them. Yes, this is a problem of tests. It does not make the underlying concept of “ability to solve new problems” invalid.