Konfundierte Ergebnisse durch ein zu stark beschränktes Design?

Recently C. Czymara and A. Schmidt-Catran published in this journal (KZfSS 2016 (2)) a factorial Survey-Experiment to contribute to the current debate on the inflow of refugees in Germany. The authors concluded from their Survey-Experiment that in particular highly qualified immigrants who show little culture distance should get accepted in Germany, while for instance Muslim immigrants would be more strongly rejected. In this comment it is argued that authors’ results probably suffered from a strong confounder bias. The employed experimental design also allows for a lot of alternative interpretations. Therefore, readers of the original article or further users of the data should be more cautious when interpreting the results.