Eyferth study

The Eyferth study is the name often given to a study conducted by psychologist Klaus Eyferth concerning the IQs of white and racially mixed children in post-Second World War West Germany. The mothers of the children studied were white German women, while their fathers were white and African-American members of the US occupation forces. In contrast to results obtained in many American studies, the average IQs of the children studied were roughly similar across racial groups, making the study an oft-cited piece of evidence in the debate about race and intelligence.
Eyferth's study was published under the title Eine Untersuchung der Neger-Mischlingskinder in Westdeutschland in the journal Vita Humana in 1959.
Study design
The children studied had been raised by their unmarried German mothers. All of the fathers, white or black, had been members of the US occupation forces stationed in Germany. At the time of the study, the children...