Imperfect Cognitions

Jes se Summers (pictured above) is Adjunct Assistant Professor at Duke University, where he is also a Post-Doctoral Fellow at the Kenan Institute for Ethics, and a Lecturing Fellow for the Thompson Writing Program. In this post he writes about rationalization and some of its benefits, summarising his paper " Post Hoc Ergo Propter Hoc: Some Benefits of Rationalisation ", which is forthcoming in a special issue of Philosophical Explorations on false but useful beliefs. The special issue is guest edited by Lisa Bortolotti and Ema Sullivan-Bissett and is inspired by project PERFECT's interests in belief. You really shouldn’t trust me. At the very least, you shouldn’t trust me when I tell you why I’ve acted. Part of the reason you shouldn’t trust me is that I often—much more often than I realize—don’t know why I’m doing something. The neuroscientist tells you that my brain predisposes me to act. Psychologists, too, assume that many factors and forces move me—my mood,...

In this post Andrea Polonioli interviews Ralph Hertwig (pictured below), director of the Center for Adaptive Rationality  at the Max Planck Institute for Human Development in Berlin. AP: According to popular accounts offered in the field of judgment and decision-making, people are prone to cognitive biases, and such biases are conducive to maladaptive behaviour. Based on your research, to what extent the claim that cognitive biases are costly is warranted by available evidence? If you had to identify one particular bias that is especially worrisome, because it typically results in negative real life outcomes, which one would this be? RH: This is a hotly debated topic in research on behavioral decision making and beyond. Many cognitive biases have been defined as such because they violate coherence norms, under the assumption that a single syntactical rule such as consistency, transitivity, the conjunction rule, or Bayes’ rule suffices to evaluate behavior. I believe that s...