Shortly before the appearance of Kelek's family sociology study in mid-March 2006, the weekly paper Die Zeit published, on February 2, 2006, an open letter, described as a petition and signed by 60 scientists from the social sciences field in general and migration research in particular, on the integration policy of Germany. The authors were the Bremen professor for intercultural education, Yasemin Karakaşoğlu, and the Cologne psychologist and journalist, Mark Terkessidis. It is directed against the prominent position of Kelek in the official political discourse, and points out deviations from the scientific method in her popular publications. While the conclusions she drew in her dissertation from the data she gathered are scientifically sound, Kelek used that same data set and generalized individual cases into examples of generic features of Muslim migrants with her book and her newspaper articles.