Ralph Hertwig (born 4 November 1963, in Heilbronn, West Germany) is a German psychologist whose work focuses on the psychology of human judgment and decision making. Hertwig is Director of the Center for Adaptive Rationality at the Max Planck Institute for Human Development in Berlin, Germany. He grew up with his brothers Steffen Hertwig and Michael Hertwig (parents Walter and Inge Hertwig) in Talheim, Heilbronn.
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