When does one's IQ stop growing?

Question

I am 15 and my IQ is 140.

Answer 1

Your IQ does not change. It is a way to measure how much you can learn and how you retain information for your particular learning style. Also it can fluctuate but it depends on the test.

Answer 2

As a special education teacher, I get a lot of reports with IQ scores in them. When the child is very young (say, 5 years or younger), there are often questions about the validity of the score. But in older children and adults, scores don't change in any significant way over the years. This is because an IQ score is based on a ratio of mental age to chronological age. For example, a 10-year-old who functions at the level of a typical 7 year old would have an IQ of 70, or mildly mentally retarded. A 10 year old who functions intellectually at the level of an average 10 year old has an IQ of 100, or average, and a 10 year old who has the cognitive abilities of an typical 14 year old would have an IQ of 140, or gifted.
The most widely used IQ tests use age 15 or 16 as adult level. So - assuming that you have been administered a reliable and valid test - you are considered intellectually gifted, and you should continue to function at approximately this level for the rest of your life.
This doesn't mean that you stop learning or acquiring knowledge and even wisdom; it just assumes that gifted people will generally continue to become more enlightened with age and life experience. If you are above average as a teenager, you should continue to be above average as an adult. But you are unlikely to gain any significant IQ points over your lifetime.

Answer 3

Your IQ can change as many as 25 points.


It doesn't have a lot to do with age, but, more or less the scale the test is scored with. Younger children tend to have inflated scores; meaning, as they get older their IQ scores go down. This is because of the scale used to calculate child scores.

You also have to consider the Standard deviation. 140 on the catell scale is 124 on the more common, SD 15 scale. And vise versa, 140 on the SD 15 scale is 160 catell.



Also, with regards to people saying scores are in relation to your age, this is FALSE after the age of 16. After 16 your score is compared to the entire population. Mental age scores are usually inaccurate; for example, Marilyn Vos Savant tested at 228 as a child and 186 as an adult. Not because she got dumber, but because her score was inflated by the scale they use on children.

Answer 4

It doesn't - common measurement for IQ is the score you achieve divided by your age. As you continue learning, your IQ can remain stable or increase.

Answer 5

i depends on you. as far as you try and work your IQ will improve. by the time you stop thinking your IQ stop growing but usually it stop at 40

Answer 6

hhmm, i don't think an IQ can change and different tests state different results. i think it's a way to measure the amount you can learn and how you get the info information for your particular learning style. anyway, you always learn something new everyday.