(Toronto, Canada, 1954) Canadian-born psychologist and political science writer, currently a professor at the University of Pennsylvania. He has published over two hundred articles in scientific journals and various essays, at the intersection of psychology, political science and organizational behavior, including Supervision: The Art and Science of Prediction (2015), The political judgment of experts (2005), Undoing the West: hypothetical scenarios that would rewrite world history (2006) and Experiments of counterfactual thinking in world politics (2006).

Since 2011, Tetlock and his partner, researcher Barbara Mellers, coordinate The Good Judgment Project, a research project on the feasibility of improving the accuracy of probability judgments about real-world events. Over the past four decades, his research has focused primarily on five themes: the concept of "good judgment", the impact of accountability on judgment and choice, the limitations that sacred values ​​carry in our thinking, the difficult distinction between political science and political psychology and the need to unravel the impact of facts and value judgments on the competition of political offers.