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A comment on Average IQ scores seem to have been falling and population ageing may be why. Parent comment

Re:Average IQ scores seem to have been falling and populatio... by Alex3917 on Friday September 29, 2017 @08:57AM (#15364789)
> Don't they test each new generation at same time?

IQ scores are relative to people the same age, so it wouldn’t matter.

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Re:Average IQ scores seem to have been falling and populatio... by troupe on Friday September 29, 2017 @10:01AM (#15365315)
The article implies that this might be possible. Maybe what you are describing is only true for children and all adults are in the same category?
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