It looks like a meta-analysis to me, so probably more than one paper. As for that little cluster of outliers, it may simply be outliers from different parts of the world, but 6 dots is also the exact number of countries in "South Asia." India, Nepal, Bangladesh, Sri Lanka, Maldives and Pakistan.
It looks like a meta-analysis to me, so probably more than one paper. As for that little cluster of outliers, it may simply be outliers from different parts of the world, but 6 dots is also the exact number of countries in "South Asia." India, Nepal, Bangladesh, Sri Lanka, Maldives and Pakistan.
Even if they weren't a contiguous geographic region, I'd be very curious to see what their cultures have in common.