What is the IQ scale based off of?
What difference does 1 IQ more make? or 10 more make?
Can it ever change over time or is it a creature’s/person’s own level of understanding rather than what they know?
In: Biology
The IQ scale is set by what your mental age is, vs your actual age, times 100. So, if you’re 25, and you are as mentally able to function as a 25 year old should be, your IQ would be 100, which is the average.
IQs do change over time. Population IQs rise by three points every ten years. 10 points is just the standard deviation. (Think using the same ruler to measure in either direction from the middle.) A lot of people are over-proud about their IQ scores, but I find it humbling to think that a 50 IQ is just as different from the average as a 150 IQ is. They aren’t 1/3rd as smart as the other… they have something very much in common.
Side fact: since a person below a certain IQ level cannot be given a death sentence for a crime, there have been cases where lives have been protected by adjusting for IQ inflation.
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