English Americans are most introverted, Jewish Americans are least: Here are mean introversion scores for various white American groups:
Mean introversion score (N = more than 20,000)
All ethnicities 14.0*
* p < .05, two-tail test, compared with English/Welsh
The groups with asterisks are significantly more extraverted than Americans of English or Welsh descent. Here are the effect sizes for those who differ significantly:
The differences among whites groups, even at the extremes, are small.
I checked to see if the observed pattern was influenced by immigration. I suspected that immigrants are more introverted than natives, and I was right. If we compare Jews and those of English descent born in America, the effect size increases to .37--a moderate difference.
This Gallup poll is from a survey of over 300k Americans in 2017. You can see a dramatic uptick from 5.8% to 8.2% among Millennials identify...
In the comments in the last post , some readers contended that Jews are not ethnocentric. Using the same question I used in the comments se...
Via a reader at iSteve, it looks like this might be the vocabulary test used by the General Social Survey. (Someone please tell me if I'...
The National Couples Survey asked married people if they've had anal intercourse in the past four weeks. Here are their responses by ra...