The society has about 1,500 members. Although meetings have always been in North America, the membership is international. The President and some of the Executive Board are chosen by approval voting.
The society was founded in 1980 by James Shanteau, Charles Gettys, and others, as a way of bringing together researchers who study human judgments and decisions from different perspectives.
The annual conference has been held every year in conjunction with the meeting of the Psychonomic Society, now overlapping by two days, in mid-November. More than 700 people attended the conference in 2015 and in 2016. The 2017 conference will be held in Vancouver, BC.
The Society has published a book series, first in cooperation with Cambridge University Press and now in cooperation with Lawrence Erlbaum Associates. It also publishes an open-access on-line journal called Judgment and Decision Making, as of July 2007.
The history of the society is described in a series of articles in the newsletter, available on line in the Society home page, by James Shanteau: June 2003, September 2003, and March 2004.