%A M.A. Mante %X This thesis has the aim to better understand the variations in attitudes towards migrants. It will do so using the group threat theory introduced by Lincoln Quillian in 1995. This theory suggests an interaction between GDP and the percentage of non-EU migrants in society. To analyse this research question open source data for European countries are used, with data about the attitudes of national populations towards migrants derived from the European Social Survey (ESS) and data about the percentage of non-EU migrants and GDP are collected from Eurostat. Applied in the context of contemporary Europe, the group threat theory seems to hold true for most of the cases. But it fails to explain two specific cases. The theory has to be extended to include the factors playing a role in those cases. %L theses_frw1337 %D 2018 %T Testing the Group threat theory in an European context