Comment on brains!
blandfordforever@lemm.ee 3 weeks agoYou provided a link to reader’s digest. It’s not the most credible reference.
A negative IQ score and an IQ score above 200 would be possible with larger populations.
Comment on brains!
blandfordforever@lemm.ee 3 weeks agoYou provided a link to reader’s digest. It’s not the most credible reference.
A negative IQ score and an IQ score above 200 would be possible with larger populations.
Knock_Knock_Lemmy_In@lemmy.world 3 weeks ago
I’m struggling to see how a negative IQ can be practically assessed.
blandfordforever@lemm.ee 3 weeks ago
I think the confusion is that IQ is not an objective measurement. It’s subjective.
Its not like say, height, where you can have a normal distribution and then a statistical outlier.
The IQ point isnt a constant, tangeable unit of measure, like an inch. Intelligence isn’t something you can put a ruler up to and say, oh that’s weird, this person with an iq of 300 is a statistical outlier.
IQ is defined statistically. You use some method of claiming that each person has a certain ranking of intelligence. Then you use a defined mean and SD to determine what IQ value that corresponds to, in the context of everyone else in the population.
Knock_Knock_Lemmy_In@lemmy.world 3 weeks ago
Yes, a ranking. Ideally the same test for the whole population.
Here is your error. Limiting the description of the population distribution to only 2 parameters severely restricts the range of distributions that can be selected. Forcing the population distribution to be Normal is done for arithmetic convenience only. Not because intelligence must be normally distributed.
blandfordforever@lemm.ee 3 weeks ago
I’m not saying intelligence is a normal distribution. I’m saying that IQ scores are a normal distribution.
The metric, IQ is a normal distribution because that’s how the metric is defined.
I’d like to hear your explanation how an IQ of above 200 is possible and what that would actually mean.
Its only possible if there are about 10x more humans. With a population of around 80 billion, the smartest one person would have a z score of roughly 6.6 and an IQ of roughly 200. This is calculated from a mean of 100 and a standard deviation of 15, which is how it’s defined.