Ralph is the director of the Center for Adaptive Rationality at the Max Planck Institute for Human Development. His research interests lie in models of bounded and ecological rationality, decisions from experience, the psychology of risk, lifespan development of decision-making and evidence-based public policy (boosting). He is a member of the German National Academy of Sciences Leopoldina and of the Wilhelm-Wundt-Gesellschaft. He is a fellow of the Association for Psychological Science and the Max Planck School of Cognition.

He holds faculty positions at the International Max Planck Research School on the Life Course and at the International Max Planck Research School for Computational Methods in Psychiatry and Ageing Research. He has recently published two books directly relevant to SI’s work: “Taming Uncertainty” (MIT Press, 2019) and “Deliberate Ignorance: Choosing not to know” (MIT Press, 2020).