Saturday, August 20, 2022

How much has mean IQ declined in the US?

 I looked at General Social Survey data to see how much IQ has declined in the US since the early 70s when the GSS was started. I set whites tested in the 70s to a mean of 100, so they are the comparison group. Here's what I found: 














Mean IQ for the 2010s is 99.6, so compared to 1970s whites, the mean has dropped very little. It didn't drop more since we see a Flynn effect among all racial groups. The negative impact occurs because of the tremendous growth of Hispanics who have a 2010s mean IQ of 94 shown below. (All numbers exclude immigrants since they are likely to do poorly on an English-language IQ test). 






What do GSS data say about the view that many blacks do not value education?

  Some people argue that blacks do not perform academically as well as other groups because they lack a culture that places a high value on ...