The only numbers in the article:
Quote:
In countries with lower immigration rate (<15%), immigrants perform about 15 to 20 points below native-born students. Where immigration lies between 15% and 25%, native-born students and immigrants are within 10 points of each other, and where 25% or more are foreign-born, all three groups perform within five points of each other. So, in countries with high immigration rate, the locals and immigrants perform more similarily.
I can see a bunch of obvious reasons for this - like the system more accustomed to immigrants in areas where they are large part of the society. Or even more migration between closely related cultures than through considerable barriers.
Additionally, based on the list of countries in the article, the grouping is weird:
Out of 41 countries, 29 had less than 15% immigration and only 6 were over 25% - why put the majority of the subjects into one category? Why not put thresholds where they would divide the set more evenly? Why not make more categories?
I don't say the study results are wrong but the study itself is very, very flawed, which raises suspicions of manipulating the data to fit predefined results.
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Let's not confuse being normal with being mentally healthy.
<not moderating PPR stuff concerning East Europe>