Gallup created the Migrant Acceptance Index to gauge people’s acceptance of migrants based on increasing degrees of personal proximity. The index is based on three questions that Gallup asked in 138 countries in 2016 and in the U.S. in 2017. The questions ask whether people think immigrants living in their country, becoming a neighbor and marrying into their families are good things or bad things. The higher the score, the more accepting the population is of migrants.

The tendency for more social people to be more accepting of migrants holds in all regions of the world where Gallup asks these questions, but in some regions, the gap is even wider than it is at the global level. In the European Union, for example, the index score for those who typically interact with friends more than 10 times in a given week is 6.72, while it is 3.66 among those who interact once or not at all.