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?