It's like Russell's hypothetical: suppose the universe and everything in it (including all the measuring rods) doubled in size over night. How could you tell?
--- Doug Henwood <dhenwood at panix.com> wrote:
>
> On Oct 31, 2007, at 12:58 AM, Miles Jackson wrote:
>
> > IQ performance is increasing, but this is obscured
> by the fact that IQ
> > tests are standardized so that the average score
> remains 100,
> > regardless of raw score. Thus IQ test scores
> cannot be meaningfully
> > compared over decades, because the meaning of 100
> is always relative
> > to what the average performance is at a given
> time.
>
> So how do you/we/they know that IQs are rising?
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