When GSS data revealed that the mean IQs of college graduates dropped almost nine points over the past four decades, I assumed that grad schools, by contrast, had not lowered standards so much. I was wrong. Here are the means by decade for Americans in their thirties with an advanced degree:
Mean IQ of Americans with advanced degrees (sample size = 446)
* significantly lower than 1970s
The mean IQ dropped 8.6 points over the four decades--just as much as for undergraduates. College degrees across the board do not mean what they used to.
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