If you're afraid of the average IQ dropping, Fear not!
Average IQ is by definition 100 with +/- 10 for each standard deviation.
We could all drop cognitive function by a half and still have an average IQ of more or less 100. (Plus or minus relative to other countries)
Average IQ is by definition 100 with +/- 10 for each standard deviation.
We could all drop cognitive function by a half and still have an average IQ of more or less 100. (Plus or minus relative to other countries)