The Brunswik Society is an informal international association of researchers who are interested in understanding and improving human judgment and decision making. It was founded by Kenneth Hammond in 1985. Members of the Society share an appreciation of the work of the psychologist Egon Brunswik. Their research is generally based on theories, methods, and research designs from probabilistic functionalism, representative design of experiments, the lens model, and social judgment theory. The Society serves to promote communication among researchers through meetings, an annual newsletter, a Twitter feed, and an email list. There are no membership dues.