At least from the article, the study seems to be too-small-n and does not control for participants' socioeconomic backgrounds, nor for the environment where par

At least from the article, the study seems to be too-small-n and does not control for participants' socioeconomic backgrounds, nor for the environment where participants ended up (i.e. participants with degrees who move to a city after university may be more open-minded than participants without degrees who move to rural villages where less diversity and fewer opportunities exist). Not sure how much stock should be put in these results.