For many years psychological studies of the learning process have used a simulated medical diagnosis task in which symptom configurations are probabilistically related to diseases. Participants are given a set of symptoms and asked to indicate which disease is present, and feedback is given on...

This chapter reports several robustness checks. OJ specifications designed to capture prior beliefs and non-linear responses to news detected some transient effects in many subjects, but for the most part the final regression is indistinguishable from the basic specification presented in this...