What is the nationality of the physician who conducted experiments on Jona Laks ?
Jona Laks Jona Laks (born 1930) is a Polish Jewish Holocaust survivor who was subject to human experimentation by Josef Mengele at the Auschwitz concentration camp. After the war she founded and served as chairwoman of the Organization of the Mengele Twins. In January 2015 she addressed the United Nations General Assembly at its International Day of Commemoration in Memory of the Victims of the Holocaust Memorial Ceremony. She has been featured in several documentary films.
Robert Yerkes Robert Mearns Yerkes ( ; May 26, 1876 – February 3, 1956) was an American psychologist, ethologist, eugenicist and primatologist best known for his work in intelligence testing and in the field of comparative psychology.