[lbo-talk] 'American kids, dumber than dirt'

[Miles Jackson]

Doug Henwood 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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>
>   
Flynn and other IQ researchers have used a lot of sneaky techniques to 
document this.  One example: give people a modern version of the 
Stanford-Binet and the 1920s version, and assess their score on each 
test relative to the validation sample in each time era.  What you find 
is that someone who scores average on the modern test scores much higher 
than average on the 1920s test, when compared to people who took the 
test in the 1920s.

Miles